diff --git a/Server/src/main/java/core/game/content/quest/members/merlinscrystal/ArheinShopDialogue.java b/Server/src/main/java/core/game/content/quest/members/merlinscrystal/ArheinShopDialogue.java
deleted file mode 100644
index 4787892ea..000000000
--- a/Server/src/main/java/core/game/content/quest/members/merlinscrystal/ArheinShopDialogue.java
+++ /dev/null
@@ -1,185 +0,0 @@
-package core.game.content.quest.members.merlinscrystal;
-
-import core.game.content.dialogue.DialoguePlugin;
-import core.game.content.dialogue.FacialExpression;
-import core.game.node.entity.npc.NPC;
-import core.game.node.entity.player.Player;
-import core.game.node.entity.player.link.quest.Quest;
-
-/**
- * Represents the dialogue plugin used for the arhein npc.
- * @author 'Vexia
- * @version 1.0
- */
-public final class ArheinShopDialogue extends DialoguePlugin {
-
-	/**
-	 * Constructs a new {@code ArheinShopDialogue} {@code Object}.
-	 */
-	public ArheinShopDialogue() {
-		/**
-		 * empty.
-		 */
-	}
-
-	/**
-	 * Constructs a new {@code ArheinShopDialogue} {@code Object}.
-	 * @param player the player.
-	 */
-	public ArheinShopDialogue(Player player) {
-		super(player);
-	}
-
-	@Override
-	public DialoguePlugin newInstance(Player player) {
-		return new ArheinShopDialogue(player);
-	}
-
-	@Override
-	public boolean open(Object... args) {
-		npc = (NPC) args[0];
-		if (args.length > 1) {
-			interpreter.sendDialogues(npc, null, "Hey buddy! Get away from my ship alright?");
-			stage = 2000;
-			return true;
-		}
-		interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Hello! Would you like to trade? I've a variety of wares", "for sale!");
-		stage = 0;
-		return true;
-	}
-
-	@Override
-	public boolean handle(int interfaceId, int buttonId) {
-		Quest quest = player.getQuestRepository().getQuest("Merlin's Crystal");
-		switch (stage) {
-		case 0:
-			interpreter.sendOptions("Select an Option", "Let's trade.", "No thank you.", "Is that your ship?");
-			stage = 1;
-			break;
-		case 1:
-			switch (buttonId) {
-			case 1:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Let's trade.");
-				stage = 100;
-				break;
-			case 2:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "No thanks.");
-				stage = 200;
-				break;
-			case 3:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Is that your ship?");
-				stage = 300;
-				break;
-			}
-			break;
-		case 100:
-			end();
-			npc.openShop(player);
-			break;
-		case 300:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Yes, I use it to make deliveries to my customers up and", "down the coast. These crates here are all ready for my", "next trip.");
-			stage = 301;
-			break;
-		case 301:
-			interpreter.sendOptions("Select an Option", "Where do you deliver to?", "Are you rich then?", "Do you deliver to the fort just down the coast?");
-			stage = 303;
-			break;
-		case 303:
-			switch (buttonId) {
-			case 1:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Where do you deliver to?");
-				stage = 1000;
-				break;
-			case 2:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Are you rich then?");
-				stage = 2500;
-				break;
-			case 3:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Do you deliver to the fort just down the coast?");
-				stage = 3000;
-				break;
-
-			}
-			break;
-		case 1000:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Various places up and down the coast. Mostly Karamja", "and Port Sarim.");
-			stage = 1001;
-			break;
-		case 1001:
-			interpreter.sendOptions("Select an Option", "I don't suppose I could get a lift anywhere?", "Well, good luck with your business.");
-			stage = 1002;
-			break;
-		case 1002:
-			switch (buttonId) {
-			case 1:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "I don't suppose I could get a lift anywhere?");
-				stage = 1003;
-				break;
-			case 2:
-				interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Well, good luck with your business.");
-				stage = 2700;
-				break;
-
-			}
-			break;
-		case 1003:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Sorry pal, but I'm afraid I'm not quite ready to sail yet.");
-			stage = 1004;
-			break;
-		case 1004:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "I'm waiting on a big delivery of candles which I need to", "deliver further along the coast.");
-			stage = 1005;
-			break;
-		case 1005:
-			end();
-			break;
-		case 2500:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Business is going reasonably well... I wouldn't say I was the", "richest of merchants every, but I'm doing fairly well all", "things considered.");
-			stage = 2501;
-			break;
-		case 2501:
-			end();
-			break;
-		case 2700:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Thanks buddy!");
-			stage = 2701;
-			break;
-		case 2701:
-			end();
-			break;
-		case 200:
-			end();
-			break;
-		case 2000:
-			interpreter.sendDialogues(player, null, "Yeah... uh... sorry...");
-			stage = 2001;
-			break;
-		case 2001:
-			end();
-			break;
-		case 3000:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "Yes, I do have orders to deliver there from time to", "time. I think I may have some bits and pieces for them", "when I leave here next actually.");
-			if (quest.getStage(player) == 30 || quest.getStage(player) == 40) {
-				stage = 3001;
-			} else {
-				stage = 2701;
-			}
-			break;
-		case 3001:
-			interpreter.sendDialogues(player, FacialExpression.HALF_GUILTY, "Can you drop me off on the way down please?");
-			stage = 3002;
-			break;
-		case 3002:
-			interpreter.sendDialogues(npc, FacialExpression.HALF_GUILTY, "I don't think Sir Mordred would like that. He wants as", "few outsiders visiting as possible. I wouldn't want to lose", "his business.");
-			quest.setStage(player, 40);
-			stage = 2701;
-			break;
-		}
-		return true;
-	}
-
-	@Override
-	public int[] getIds() {
-		return new int[] { 563 };
-	}
-}
\ No newline at end of file
diff --git a/Server/src/main/java/core/game/content/quest/members/merlinscrystal/MerlinCrystal.java b/Server/src/main/java/core/game/content/quest/members/merlinscrystal/MerlinCrystal.java
index 42b7d4fd9..0fbac8411 100644
--- a/Server/src/main/java/core/game/content/quest/members/merlinscrystal/MerlinCrystal.java
+++ b/Server/src/main/java/core/game/content/quest/members/merlinscrystal/MerlinCrystal.java
@@ -79,7 +79,6 @@ public final class MerlinCrystal extends Quest {
 	public Quest newInstance(Object object) {
 		ClassScanner.definePlugins(new CrateCutscenePlugin(),
 				new MerlinCrystalPlugin(),
-				new ArheinShopDialogue(),
 				new BeggarDialogue(),
 				new CandleMakerDialogue(),
 				new KingArthurDialogue(),
diff --git a/Server/src/main/kotlin/rs09/ServerStore.kt b/Server/src/main/kotlin/rs09/ServerStore.kt
index 317fb9e6b..0bbe3cc77 100644
--- a/Server/src/main/kotlin/rs09/ServerStore.kt
+++ b/Server/src/main/kotlin/rs09/ServerStore.kt
@@ -3,6 +3,9 @@ package rs09
 import api.PersistWorld
 import api.ShutdownListener
 import api.StartupListener
+import api.getItemName
+import core.game.node.entity.npc.NPC
+import core.game.node.entity.player.Player
 import org.json.simple.JSONArray
 import org.json.simple.JSONObject
 import org.json.simple.parser.JSONParser
@@ -131,5 +134,71 @@ class ServerStore : PersistWorld {
             }
             return jArray
         }
+
+        /** NPCItemMemory
+         * These next methods handle the NPCItemMemory database. these are server-stored JSON objects,
+         * which are based on an npc and an item.
+         * each NPC can have a JSON object for itself for any item.
+         * the NPC Item object can store integer values for individual players, using their names as keys.
+         * the first methods handle the serverstore filename and accessing the JSON object.
+         * these methods are wrapped by more convenient ones that allow access for a particular player, see below.
+         */
+        fun NPCItemFilename(npc: Int, item: Int, period: String = "daily"): String {
+            val itemName = getItemName(item).lowercase().replace(" ","-")
+            val npcName = NPC(npc).name.lowercase()
+            return "$period-$npcName-$itemName"
+        }
+        fun NPCItemMemory(npc: Int, item: Int, period: String = "daily"): JSONObject {
+            return getArchive(NPCItemFilename(npc,item,period))
+        }
+
+        /** NPCItemMemory Player Access
+         * These next functions handle individual player access to the NPC Item Memory database.
+         * each of the functions has at least 3 mandatory arguments: npc, item, player.
+         * These functions can be used to allow players to access a daily- or weekly-reset stock of a particular item overseen by a particular NPC.
+         *
+         * note that none of these functions perform tangible actions on the player.
+         * whoever calls these functions is responsible for handling tangible actions like putting items in an inventory.
+         * these functions simply return and update the NPCItemMemory database numbers in useful ways.
+         */
+
+        /** getNPCItemStock:
+         * gets the available stock of a particular item at a particular NPC for a particular player.
+         */
+        fun getNPCItemStock(npc: Int, item: Int, limit: Int, player: Player, period: String = "daily"): Int {
+            val itemMemory = NPCItemMemory(npc,item)
+            val key = player.name
+            var stock = limit-itemMemory.getInt(key)
+            stock = maxOf(stock,0)
+            return stock
+        }
+        /** getNPCItemAmount:
+         * gets the usable amount of a particular item from a particular npc for a particular player.
+         * this is essentially just a requested amount cut to conform to stock and nonnegative requirements.
+         * what this function does is it takes a requested amount, cuts it down to be equal to available stock if
+         * available stock is less than the requested amount, and then additionally sets a minimum of 0.
+         */
+        fun getNPCItemAmount(npc: Int, item: Int, limit: Int, player: Player, amount: Int, period: String = "daily"): Int {
+            val stock = getNPCItemStock(npc,item,limit,player,period)
+            var realamount = minOf(amount,stock)
+            realamount = maxOf(realamount,0)
+            return realamount
+        }
+        /** addNPCItemAmount:
+         * this function updates the NPC Item Memory database entry for a particular player.
+         * it is intended to be called after all the actions that use the number have been successfully completed.
+         * this function will *add* the amount argument to the current npc item memory entry for that player. this means that
+         * the amount argument is the amount to add, not the absolute final amount.
+         * this function will handle correctly setting the limit and any other required semantics.
+         */
+        fun addNPCItemAmount(npc: Int, item: Int, limit: Int, player: Player, amount: Int, period: String =  "daily") {
+            val itemMemory = NPCItemMemory(npc,item,period)
+            val key = player.name
+            var realamount = itemMemory.getInt(key) + amount
+            realamount = minOf(realamount,limit)
+            realamount = maxOf(realamount,0)
+            itemMemory[key] = realamount
+        }
     }
-}
\ No newline at end of file
+}
+
diff --git a/Server/src/main/kotlin/rs09/game/content/dialogue/region/catherby/ArheinDialogue.kt b/Server/src/main/kotlin/rs09/game/content/dialogue/region/catherby/ArheinDialogue.kt
new file mode 100644
index 000000000..9ca851907
--- /dev/null
+++ b/Server/src/main/kotlin/rs09/game/content/dialogue/region/catherby/ArheinDialogue.kt
@@ -0,0 +1,189 @@
+package rs09.game.content.dialogue.region.catherby
+import api.*
+import core.game.content.dialogue.DialoguePlugin
+import core.game.content.dialogue.FacialExpression
+import core.game.node.entity.npc.NPC
+import core.game.node.entity.player.Player
+import core.game.node.item.Item
+import core.plugin.Initializable
+import core.tools.StringUtils
+import org.rs09.consts.NPCs
+import rs09.ServerStore
+import rs09.game.content.dialogue.Topic
+import rs09.tools.END_DIALOGUE
+import org.rs09.consts.Items
+import rs09.game.content.quest.members.merlinsquest.ArheinMCDialogue
+
+
+/**
+ * @author lila
+ */
+
+/**
+ * Arhein dialogue
+ * This class handles all dialogue from the Catherby dock NPC Arhein.
+ *
+ * Arhein is relevant to:
+ * Merlin's Crystal quest
+ * crafting/glassmaking - via selling seaweed
+ * farming/supercompost - via selling pineapples
+ */
+
+@Initializable
+class ArheinDialogue(player: Player? = null) : DialoguePlugin(player) {
+
+    val limits = mapOf(
+        Items.PINEAPPLE_2114 to 40,
+        Items.SEAWEED_401 to 80
+    )
+    val period = "daily"
+
+    // this function handles Arhein's specialty stock (pineapple and seaweed) transactions.
+    fun getGoods(requestedItem: Int, requestedAmount: Int): Int {
+        val price = 2
+        val afford = player.getInventory().getAmount(Items.COINS_995) / price
+        var realamount = minOf(requestedAmount, afford)
+        val exactafford = (realamount == afford) && (afford == freeSlots(player) + 1)
+        realamount = minOf(realamount,if(exactafford) realamount else freeSlots(player))
+        realamount = ServerStore.getNPCItemAmount(NPCs.ARHEIN_563, requestedItem, limits.getOrDefault(requestedItem,0), player, realamount, period)
+        if (removeItem(player, Item(Items.COINS_995, realamount * price), Container.INVENTORY)) {
+            if (addItem(player, requestedItem, realamount, Container.INVENTORY)) {
+                ServerStore.addNPCItemAmount(NPCs.ARHEIN_563, requestedItem, limits.getOrDefault(requestedItem,0), player, realamount, period)
+                return realamount
+            }
+        }
+        return 0
+    }
+    // this function handles selecting which of the specialty stock items (pineapple or seaweed) to use.
+    fun selectGoods(requestedItem: Int) {
+        this.goods = requestedItem
+        this.stock = ServerStore.getNPCItemStock(NPCs.ARHEIN_563,this.goods,limits.getOrDefault(this.goods,0),player,period)
+    }
+
+    // some class variables that handle the special stock (pineapples and seaweed)
+    private var goods = Items.PINEAPPLE_2114
+    private var goodsMessage = ""
+    private var goodsName = ""
+    private var stock = 0
+
+    /** Arhein Dialogue Opener
+     * If the opener is called with nontrivial arguments, then this indicates that the player tried to board the ship without permission.
+     * In that case, Arhein tells the player to bugger off.
+     * Otherwise, start the normal dialogue.
+     * Before all this, we check and initialize some important information for Arhein's specialty stock.
+     */
+    override fun open(vararg args: Any?): Boolean {
+        npc = args[0] as NPC
+
+        if (args.size > 1) {
+            npcl(FacialExpression.ANGRY, "Hey buddy! Get away from my ship alright?")
+            stage = 701
+        } else {
+            npcl(FacialExpression.HAPPY, "Hello! Would you like to trade? I've a variety of wares for sale!")
+            stage = 1
+        }
+        return true
+    }
+
+    /** Arhein Dialogue Handler
+     * Handler for the dialogue. the handler determines dialogue content and flow,
+     * as well as some specialty operations to handle special things like quest progress and specialty stock.
+     */
+    override fun handle(interfaceId: Int, buttonId: Int): Boolean {
+        when(stage) {
+            1 -> showTopics(
+                Topic("Let's Trade.", 7),
+                Topic("I hear that you sell pineapples.",800),
+                Topic("I hear that you sell seaweed.",900),
+                Topic("No thank you.", END_DIALOGUE),
+                Topic("Is that your ship?", 100)
+            )
+            7  -> npc.openShop(player).also { stage = END_DIALOGUE }
+            100 -> npcl(FacialExpression.NEUTRAL, "Yes, I use it to make deliveries to my customers up and down the coast. These crates here are all ready for my next trip.").also { stage++ }
+            101 -> showTopics(
+                Topic("Where do you deliver to?",120),
+                Topic("Are you rich then?", 110),
+                Topic("Do you deliver to the fort just down the coast?",500)
+            )
+            110 -> npcl(FacialExpression.NEUTRAL, "Business is going reasonably well... I wouldn't say I was the richest of merchants ever, but I'm doing fairly well all things considered.").also { stage = END_DIALOGUE }
+            120 -> npcl(FacialExpression.NEUTRAL, "Various places up and down the coast. Mostly Karamja and Port Sarim.").also { stage++ }
+            121 -> showTopics(
+                Topic("I don't suppose I could get a lift anywhere?",140),
+                Topic("Well, good luck with your business.",130)
+            )
+            130 -> npcl(FacialExpression.HAPPY,"Thanks buddy!").also { stage = END_DIALOGUE }
+            140 -> npcl(FacialExpression.GUILTY,"Sorry pal, but I'm afraid I'm not quite ready to sail yet.").also { stage++ }
+            141 -> npcl(FacialExpression.NEUTRAL,"I'm waiting on a big delivery of candles which I need to deliver further along the coast.").also { stage = END_DIALOGUE }
+            500 -> npcl(FacialExpression.HALF_THINKING, "Yes, I do have orders to deliver there from time to time. I think I may have some bits and pieces for them when I leave here next actually.").also {
+                val queststage = player.questRepository.getStage("Merlin's Crystal")
+                if(queststage == 30 || queststage == 40) {
+                    loadFile(ArheinMCDialogue(queststage))
+                } else {
+                    stage = END_DIALOGUE
+                }
+            }
+            701 -> playerl(FacialExpression.GUILTY,"Yeah... uh... sorry...").also{ stage = END_DIALOGUE }
+            800 -> {
+                // Pineapples
+                selectGoods(Items.PINEAPPLE_2114)
+                // and now the conditional block to handle cases
+                if(stock==0) {
+                    npcl(FacialExpression.SAD,"Actually, I've run out. Come back tomorrow and I should have some more.")
+                    stage = END_DIALOGUE
+                } else {
+                    // approximately authentic dialogue prompt for buying pineapples from arhein. (closest known dialogues do not make grammatical sense when spliced.)
+                    this.goodsMessage = "I certainly do! I've got ${stock} in stock, going for 2 coins each. How many would you like?"
+                    npcl(FacialExpression.HAPPY,this.goodsMessage)
+                    this.goodsName = if(stock==1) getItemName(this.goods) else StringUtils.plusS(getItemName(this.goods))
+                    stage = 1200
+                }
+            }
+            900 -> {
+                // Seaweed
+                selectGoods(Items.SEAWEED_401)
+                // and now the conditional block to handle cases
+                if(stock==0) {
+                    npcl(FacialExpression.SAD,"Actually, I've run out. Come back tomorrow and I should have some more.")
+                    stage = END_DIALOGUE
+                } else {
+                    // approximately authentic dialogue prompt for buying seaweed from arhein. (closest known dialogues do not make grammatical sense when spliced.)
+                    this.goodsMessage = "I certainly do! I've ${stock} at the moment and they cost 2 coins each. How many would you like?"
+                    npcl(FacialExpression.HAPPY,this.goodsMessage)
+                    this.goodsName = getItemName(this.goods)
+                    stage = 1200
+                }
+            }
+            1200 -> {
+                // arhein specialty items sales
+                val goodsPrompt = "Arhein has ${this.stock} ${this.goodsName}. How many would you like to buy?"
+                sendInputDialogue(player,InputType.AMOUNT, goodsPrompt) { value ->
+                    val amountReceived = getGoods(this.goods,Integer.parseInt(value.toString()))
+                    var exitMsg = ""
+                    if(amountReceived==this.stock) {
+                        exitMsg = "Here you go! I've run out for now. Come again tomorrow and I should have more."
+                    } else if (amountReceived>0) {
+                        // inauthentic exit dialogue for arhein's pineapple/seaweed sales. documented dialogue that i found indicates that there is no exit message.
+                        // i kept the spirit of arhein's personality, using "buddy!" that is known from another line.
+                        exitMsg = "Here you go, buddy!"
+                    } else {
+                        // same deal here, inauthentic exit dialogue based on arhein's authentic personality.
+                        exitMsg = "Take care, buddy!"
+                    }
+                    npcl(FacialExpression.HAPPY,exitMsg)
+                }
+                stage = END_DIALOGUE
+            }
+        }
+        return true
+    }
+
+
+    // finale funz - newInstance, getIds
+    override fun newInstance(player: Player?): DialoguePlugin {
+        return ArheinDialogue(player)
+    }
+    override fun getIds(): IntArray {
+        return intArrayOf(NPCs.ARHEIN_563)
+    }
+}
+
diff --git a/Server/src/main/kotlin/rs09/game/content/quest/members/merlinsquest/ArheinMCDialogue.kt b/Server/src/main/kotlin/rs09/game/content/quest/members/merlinsquest/ArheinMCDialogue.kt
new file mode 100644
index 000000000..86358d38c
--- /dev/null
+++ b/Server/src/main/kotlin/rs09/game/content/quest/members/merlinsquest/ArheinMCDialogue.kt
@@ -0,0 +1,29 @@
+package rs09.game.content.quest.members.merlinsquest
+
+import core.game.content.dialogue.FacialExpression
+import rs09.game.content.dialogue.DialogueFile
+import rs09.tools.END_DIALOGUE
+import rs09.tools.START_DIALOGUE
+
+/**
+ * @author lila
+ */
+
+/**
+ * This class handles dialogue for Arhein for the Merlin's Crystal quest
+ */
+
+class ArheinMCDialogue (val questStage: Int) : DialogueFile() {
+    override fun handle(componentID: Int, buttonID: Int) {
+        when (stage) {
+            START_DIALOGUE -> playerl(FacialExpression.NEUTRAL, "Can you drop me off on the way down please?").also { stage++ }
+            1 -> {
+                npcl(FacialExpression.ANNOYED,"I don't think Sir Mordred would like that. He wants as few outsiders visiting as possible. I wouldn't want to lose his business.")
+                val quest = player!!.questRepository.getQuest("Merlin's Crystal")
+                player!!.questRepository.setStage(quest, 40)
+                stage = END_DIALOGUE
+            }
+        }
+    }
+
+}
\ No newline at end of file