diff --git a/.gitignore b/.gitignore
index 0d77cbba6..bc3d39267 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,6 @@ gradle-app.setting
 # gradle/wrapper/gradle-wrapper.properties
 /commit.sh
 /publish.sh
+/slice-api/
+/slice-server/
+/generated/
diff --git a/gradle.properties b/gradle.properties
index 8c4d1f2ab..3c8ded614 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 group=com.lokamc.slice
 version=1.21.3-R0.1-SNAPSHOT
 mcVersion=1.21.3
-paperRef=ae80a251fc75abee4082981ac1ee59ccb2c9d96b
+paperRef=c2294d7067959d264eb8ad275557f194a3e2656f
 updatingMinecraft=false
 
 org.gradle.caching=true
diff --git a/patches/api/0017-Map-Events.patch b/patches/api/0017-Map-Events.patch
new file mode 100644
index 000000000..58ccfec81
--- /dev/null
+++ b/patches/api/0017-Map-Events.patch
@@ -0,0 +1,114 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Cryptite <cryptite@gmail.com>
+Date: Mon, 2 Dec 2024 11:52:34 -0600
+Subject: [PATCH] Map Events
+
+
+diff --git a/src/main/java/io/papermc/paper/event/server/MapGetFreeIndexEvent.java b/src/main/java/io/papermc/paper/event/server/MapGetFreeIndexEvent.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..25999adb10ed0f3514332d64f27ea118bfccbfb4
+--- /dev/null
++++ b/src/main/java/io/papermc/paper/event/server/MapGetFreeIndexEvent.java
+@@ -0,0 +1,41 @@
++package io.papermc.paper.event.server;
++
++import org.bukkit.event.HandlerList;
++import org.bukkit.event.server.ServerEvent;
++import org.jetbrains.annotations.ApiStatus;
++import org.jspecify.annotations.NullMarked;
++
++/**
++ * Called when we try to fetch a new index for a newly-created map.
++ */
++@NullMarked
++public class MapGetFreeIndexEvent extends ServerEvent {
++    public static final HandlerList HANDLER_LIST = new HandlerList();
++
++    private int index = -1;
++    @ApiStatus.Internal
++    public MapGetFreeIndexEvent() {
++    }
++
++    public int getIndex() {
++        return index;
++    }
++
++    public void setIndex(int index) {
++        this.index = index;
++    }
++
++    public static HandlerList getHandlerList() {
++        return HANDLER_LIST;
++    }
++
++    @Override
++    public HandlerList getHandlers() {
++        return HANDLER_LIST;
++    }
++
++    public enum Cause {
++        COMMAND,
++        PLUGIN,
++    }
++}
+diff --git a/src/main/java/io/papermc/paper/event/server/MapLoadEvent.java b/src/main/java/io/papermc/paper/event/server/MapLoadEvent.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..0dfab37f18b797003b932a8a8b16943c1dd7677c
+--- /dev/null
++++ b/src/main/java/io/papermc/paper/event/server/MapLoadEvent.java
+@@ -0,0 +1,55 @@
++package io.papermc.paper.event.server;
++
++import org.bukkit.event.HandlerList;
++import org.bukkit.event.server.ServerEvent;
++import org.jetbrains.annotations.ApiStatus;
++import org.jspecify.annotations.NullMarked;
++import org.jspecify.annotations.Nullable;
++
++import java.io.ByteArrayInputStream;
++import java.io.ByteArrayOutputStream;
++
++/**
++ * Called when we want to load a Map from disk
++ */
++@NullMarked
++public class MapLoadEvent extends ServerEvent {
++    public static final HandlerList HANDLER_LIST = new HandlerList();
++
++    private int id;
++    private ByteArrayInputStream buf;
++    @ApiStatus.Internal
++    public MapLoadEvent(int id) {
++        this.id = id;
++    }
++
++    public int getIndex() {
++        return id;
++    }
++
++    public void setIndex(int index) {
++        this.id = index;
++    }
++
++    public @Nullable ByteArrayInputStream getBuf() {
++        return buf;
++    }
++
++    public void setBuf(ByteArrayInputStream buf) {
++        this.buf = buf;
++    }
++
++    public static HandlerList getHandlerList() {
++        return HANDLER_LIST;
++    }
++
++    @Override
++    public HandlerList getHandlers() {
++        return HANDLER_LIST;
++    }
++
++    public enum Cause {
++        COMMAND,
++        PLUGIN,
++    }
++}
diff --git a/patches/server/0026-Map-Events.patch b/patches/server/0026-Map-Events.patch
new file mode 100644
index 000000000..94a53b15b
--- /dev/null
+++ b/patches/server/0026-Map-Events.patch
@@ -0,0 +1,52 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Cryptite <cryptite@gmail.com>
+Date: Mon, 2 Dec 2024 11:52:34 -0600
+Subject: [PATCH] Map Events
+
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
+index e256e5ff5c167c6cff5b9e985cdc80d5c9203708..5f0439860468283dcdcce17fefc22c5e088b8dc4 100644
+--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
++++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
+@@ -2119,6 +2119,14 @@ public class ServerLevel extends Level implements ServerEntityGetter, WorldGenLe
+ 
+     @Override
+     public MapId getFreeMapId() {
++        // Slice start
++        io.papermc.paper.event.server.MapGetFreeIndexEvent event = new io.papermc.paper.event.server.MapGetFreeIndexEvent();
++        event.callEvent();
++        int newIndex = event.getIndex();
++        if (newIndex != -1) {
++            return new MapId(newIndex);
++        }
++        // Slice end
+         return ((MapIndex) this.getServer().overworld().getDataStorage().computeIfAbsent(MapIndex.factory(), "idcounts")).getFreeAuxValueForMap();
+     }
+ 
+diff --git a/src/main/java/net/minecraft/world/level/storage/DimensionDataStorage.java b/src/main/java/net/minecraft/world/level/storage/DimensionDataStorage.java
+index 4f256e61f858020f32e7a66664375ba05a57826b..04f989bb34bda3f71501156d727074fad0df3e7e 100644
+--- a/src/main/java/net/minecraft/world/level/storage/DimensionDataStorage.java
++++ b/src/main/java/net/minecraft/world/level/storage/DimensionDataStorage.java
+@@ -70,6 +70,22 @@ public class DimensionDataStorage implements AutoCloseable {
+     @Nullable
+     private <T extends SavedData> T readSavedData(BiFunction<CompoundTag, HolderLookup.Provider, T> readFunction, DataFixTypes dataFixTypes, String id) {
+         try {
++            // Slice start
++            if (id.startsWith("map_")) {
++                int mapId = Integer.parseInt(id.split("map_")[1]);
++                io.papermc.paper.event.server.MapLoadEvent event = new io.papermc.paper.event.server.MapLoadEvent(mapId);
++                event.callEvent();
++                ByteArrayInputStream buf = event.getBuf();
++                if (buf != null) {
++                    try {
++                        return readFunction.apply(NbtIo.readCompressed(buf, NbtAccounter.unlimitedHeap()), this.registries);
++                    } catch (IOException e) {
++                        LOGGER.error("Error loading saved data: {}", id, e);
++                    }
++                }
++            }
++            // Slice end
++
+             Path path = this.getDataFile(id);
+             if (Files.exists(path)) {
+                 CompoundTag compoundTag = this.readTagFromDisk(id, dataFixTypes, SharedConstants.getCurrentVersion().getDataVersion().getVersion());