diff --git a/pom.xml b/pom.xml
index e4267cba..213ee0c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.github.yuttyann</groupId>
   <artifactId>ScriptBlockPlus</artifactId>
-  <version>2.3.4</version>
+  <version>2.3.5</version>
 
   <name>ScriptBlockPlus</name>
   <url>https://github.com/yuttyann/ScriptBlockPlus</url>
diff --git a/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/NetMinecraft.java b/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/NetMinecraft.java
index 5dfd509b..b85b9fcb 100644
--- a/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/NetMinecraft.java
+++ b/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/NetMinecraft.java
@@ -302,6 +302,8 @@ public enum NetMinecraft implements SimpleReflection {
     WORLD_ENTITY_ITEM(WORLD_ENTITY, "item"),
     /** {@code net.minecraft.world.entity.monster} */
     WORLD_ENTITY_MONSTER(WORLD_ENTITY, "monster"),
+    /** {@code net.minecraft.world.entity.monster.cubemob} */
+    WORLD_ENTITY_MONSTER_CUBEMOB(WORLD_ENTITY_MONSTER, "cubemob"),
     /** {@code net.minecraft.world.entity.monster.breeze} */
     WORLD_ENTITY_MONSTER_BREEZE(WORLD_ENTITY_MONSTER, "breeze"),
     /** {@code net.minecraft.world.entity.monster.hoglin} */
diff --git a/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessorLegacy.java b/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessorLegacy.java
index 0bc86c1e..9c625955 100644
--- a/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessorLegacy.java
+++ b/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessorLegacy.java
@@ -26,6 +26,7 @@
 import static org.apache.commons.lang3.ArrayUtils.*;
 import static org.apache.commons.lang3.math.NumberUtils.*;
 
+import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
 import org.bukkit.Bukkit;
@@ -62,6 +63,19 @@ public class PaperRemappedAccessorLegacy implements NativeAccessor {
     private final Object blockPosZero;
     private final Object magmaCubeType;
 
+    /**
+     * ゲームバージョンに応じた MagmaCube クラスを取得します。
+     * <p>
+     * 26.2 以降は {@code net.minecraft.world.entity.monster.cubemob} パッケージに移動されました。
+     */
+    private static Class<?> getMagmaCubeClass() {
+        try {
+            return WORLD_ENTITY_MONSTER.getClass("MagmaCube");
+        } catch (IllegalArgumentException e) {
+            return WORLD_ENTITY_MONSTER_CUBEMOB.getClass("MagmaCube");
+        }
+    }
+
     PaperRemappedAccessorLegacy() throws ReflectiveOperationException {
         // sendPacket
         field(SERVER_LEVEL.getClass("ServerPlayer"))
@@ -257,13 +271,13 @@ public class PaperRemappedAccessorLegacy implements NativeAccessor {
             .findFirst("ContainerMenu.checkReachable");
 
         // newMagmaCube
-        construct(WORLD_ENTITY_MONSTER.getClass("MagmaCube"))
+        construct(getMagmaCubeClass())
             .parameterTypes(WORLD_ENTITY.getClass("EntityType"), WORLD_LEVEL.getClass("Level"))
             .findFirst("MagmaCube");
 
         // newCraftMagmaCube
         construct(ENTITY.getClass("CraftMagmaCube"))
-            .parameterTypes(CRAFTBUKKIT.getClass("CraftServer"), WORLD_ENTITY_MONSTER.getClass("MagmaCube"))
+            .parameterTypes(CRAFTBUKKIT.getClass("CraftServer"), getMagmaCubeClass())
             .findFirst("CraftMagmaCube");
 
         // newClientboundSetEntityDataPacket
@@ -315,10 +329,50 @@ public class PaperRemappedAccessorLegacy implements NativeAccessor {
         this.m = methods();
         this.c = constructs();
         this.blockPosZero = c.newInstance("BlockPos", INT_ARRAY_ZERO_3);
-        this.magmaCubeType = field(WORLD_ENTITY.getClass("EntityType")).modifiers(STATIC).name("MAGMA_CUBE").fieldType(WORLD_ENTITY.getClass("EntityType")).findFirst().get(null);
+        this.magmaCubeType = getMagmaCubeType();
         this.unknownReason = Enum.valueOf((Class) Utils.getClassForName("org.bukkit.event.inventory.InventoryCloseEvent$Reason"), "UNKNOWN");
     }
 
+    /**
+     * ゲームバージョンに応じた MagmaCube の {@code EntityType} を取得します。
+     * <p>
+     * 26.x では {@code EntityType.MAGMA_CUBE} の静的フィールドが廃止され、
+     * {@code BuiltInRegistries.ENTITY_TYPE} のレジストリから取得する必要があります。
+     */
+    private static Object getMagmaCubeType() throws ReflectiveOperationException {
+        // 1. EntityType.MAGMA_CUBE 静的フィールド（1.21.x 以前）
+        try {
+            return field(WORLD_ENTITY.getClass("EntityType")).modifiers(STATIC).name("MAGMA_CUBE")
+                    .fieldType(WORLD_ENTITY.getClass("EntityType")).findFirst().get(null);
+        } catch (NullPointerException ignored) { }
+
+        // 2. BuiltInRegistries.ENTITY_TYPE レジストリから取得（1.21.11+ / 26.x）
+        try {
+            var builtInRegistriesClass = Utils.getClassForName("net.minecraft.core.registries.BuiltInRegistries");
+            var registry = builtInRegistriesClass.getField("ENTITY_TYPE").get(null);
+            Class<?> identifierClass;
+            try {
+                // 1.21.11 以降は ResourceLocation が Identifier に改名された
+                identifierClass = Utils.getClassForName("net.minecraft.resources.Identifier");
+            } catch (IllegalArgumentException ignored) {
+                identifierClass = Utils.getClassForName("net.minecraft.resources.ResourceLocation");
+            }
+            var parseMethod = identifierClass.getMethod("parse", String.class);
+            var magmaCubeKey = parseMethod.invoke(null, "minecraft:magma_cube");
+            var getValueMethod = registry.getClass().getMethod("getValue", identifierClass);
+            return getValueMethod.invoke(registry, magmaCubeKey);
+        } catch (NoSuchMethodException | NoSuchFieldException | IllegalAccessException | InvocationTargetException ignored) { }
+
+        // 3. CraftEntityType.bukkitToMinecraft から取得
+        try {
+            var craftEntityTypeClass = Utils.getClassForName("org.bukkit.craftbukkit.entity.CraftEntityType");
+            var bukkitToMinecraft = craftEntityTypeClass.getMethod("bukkitToMinecraft", org.bukkit.entity.EntityType.class);
+            return bukkitToMinecraft.invoke(null, org.bukkit.entity.EntityType.MAGMA_CUBE);
+        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) { }
+
+        throw new ReflectiveOperationException("Could not resolve EntityType for MagmaCube");
+    }
+
     @Override
     public void sendAllPacket(@NotNull Object packet) throws ReflectiveOperationException {
         var temp = new Object[] { packet };
diff --git a/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessor_v1_21_6.java b/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessor_v1_21_6.java
index 33703bc0..4ba1eede 100644
--- a/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessor_v1_21_6.java
+++ b/src/main/java/com/github/yuttyann/scriptblockplus/utils/server/minecraft/PaperRemappedAccessor_v1_21_6.java
@@ -26,6 +26,7 @@
 import static org.apache.commons.lang3.ArrayUtils.*;
 import static org.apache.commons.lang3.math.NumberUtils.*;
 
+import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
 import org.bukkit.Bukkit;
@@ -63,6 +64,19 @@ public class PaperRemappedAccessor_v1_21_6 implements NativeAccessor {
     private final Object blockPosZero;
     private final Object magmaCubeType;
 
+    /**
+     * ゲームバージョンに応じた MagmaCube クラスを取得します。
+     * <p>
+     * 26.2 以降は {@code net.minecraft.world.entity.monster.cubemob} パッケージに移動されました。
+     */
+    private static Class<?> getMagmaCubeClass() {
+        try {
+            return WORLD_ENTITY_MONSTER.getClass("MagmaCube");
+        } catch (IllegalArgumentException e) {
+            return WORLD_ENTITY_MONSTER_CUBEMOB.getClass("MagmaCube");
+        }
+    }
+
     PaperRemappedAccessor_v1_21_6() throws ReflectiveOperationException {
         // sendPacket
         field(SERVER_LEVEL.getClass("ServerPlayer"))
@@ -258,13 +272,13 @@ public class PaperRemappedAccessor_v1_21_6 implements NativeAccessor {
             .findFirst("ContainerMenu.checkReachable");
 
         // newMagmaCube
-        construct(WORLD_ENTITY_MONSTER.getClass("MagmaCube"))
+        construct(getMagmaCubeClass())
             .parameterTypes(WORLD_ENTITY.getClass("EntityType"), WORLD_LEVEL.getClass("Level"))
             .findFirst("MagmaCube");
 
         // newCraftMagmaCube
         construct(ENTITY.getClass("CraftMagmaCube"))
-            .parameterTypes(CRAFTBUKKIT.getClass("CraftServer"), WORLD_ENTITY_MONSTER.getClass("MagmaCube"))
+            .parameterTypes(CRAFTBUKKIT.getClass("CraftServer"), getMagmaCubeClass())
             .findFirst("CraftMagmaCube");
 
         // newClientboundSetEntityDataPacket
@@ -316,10 +330,50 @@ public class PaperRemappedAccessor_v1_21_6 implements NativeAccessor {
         this.m = methods();
         this.c = constructs();
         this.blockPosZero = c.newInstance("BlockPos", INT_ARRAY_ZERO_3);
-        this.magmaCubeType = field(WORLD_ENTITY.getClass("EntityType")).modifiers(STATIC).name("MAGMA_CUBE").fieldType(WORLD_ENTITY.getClass("EntityType")).findFirst().get(null);
+        this.magmaCubeType = getMagmaCubeType();
         this.unknownReason = Enum.valueOf((Class) Utils.getClassForName("org.bukkit.event.inventory.InventoryCloseEvent$Reason"), "UNKNOWN");
     }
 
+    /**
+     * ゲームバージョンに応じた MagmaCube の {@code EntityType} を取得します。
+     * <p>
+     * 26.x では {@code EntityType.MAGMA_CUBE} の静的フィールドが廃止され、
+     * {@code BuiltInRegistries.ENTITY_TYPE} のレジストリから取得する必要があります。
+     */
+    private static Object getMagmaCubeType() throws ReflectiveOperationException {
+        // 1. EntityType.MAGMA_CUBE 静的フィールド（1.21.x 以前）
+        try {
+            return field(WORLD_ENTITY.getClass("EntityType")).modifiers(STATIC).name("MAGMA_CUBE")
+                    .fieldType(WORLD_ENTITY.getClass("EntityType")).findFirst().get(null);
+        } catch (NullPointerException ignored) { }
+
+        // 2. BuiltInRegistries.ENTITY_TYPE レジストリから取得（1.21.11+ / 26.x）
+        try {
+            var builtInRegistriesClass = Utils.getClassForName("net.minecraft.core.registries.BuiltInRegistries");
+            var registry = builtInRegistriesClass.getField("ENTITY_TYPE").get(null);
+            Class<?> identifierClass;
+            try {
+                // 1.21.11 以降は ResourceLocation が Identifier に改名された
+                identifierClass = Utils.getClassForName("net.minecraft.resources.Identifier");
+            } catch (IllegalArgumentException ignored) {
+                identifierClass = Utils.getClassForName("net.minecraft.resources.ResourceLocation");
+            }
+            var parseMethod = identifierClass.getMethod("parse", String.class);
+            var magmaCubeKey = parseMethod.invoke(null, "minecraft:magma_cube");
+            var getValueMethod = registry.getClass().getMethod("getValue", identifierClass);
+            return getValueMethod.invoke(registry, magmaCubeKey);
+        } catch (NoSuchMethodException | NoSuchFieldException | IllegalAccessException | InvocationTargetException ignored) { }
+
+        // 3. CraftEntityType.bukkitToMinecraft から取得
+        try {
+            var craftEntityTypeClass = Utils.getClassForName("org.bukkit.craftbukkit.entity.CraftEntityType");
+            var bukkitToMinecraft = craftEntityTypeClass.getMethod("bukkitToMinecraft", org.bukkit.entity.EntityType.class);
+            return bukkitToMinecraft.invoke(null, org.bukkit.entity.EntityType.MAGMA_CUBE);
+        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) { }
+
+        throw new ReflectiveOperationException("Could not resolve EntityType for MagmaCube");
+    }
+
     @Override
     public void sendAllPacket(@NotNull Object packet) throws ReflectiveOperationException {
         var temp = new Object[] { packet };
diff --git a/src/main/java/com/github/yuttyann/scriptblockplus/utils/version/Version.java b/src/main/java/com/github/yuttyann/scriptblockplus/utils/version/Version.java
index 4848a90a..41de4ec1 100644
--- a/src/main/java/com/github/yuttyann/scriptblockplus/utils/version/Version.java
+++ b/src/main/java/com/github/yuttyann/scriptblockplus/utils/version/Version.java
@@ -54,8 +54,25 @@ public static Version of(@NotNull String version) {
         if (dot1 < 0) {
             throw new IllegalArgumentException("Invalid Version: " + version);
         }
-        int part1 = parseInt(version, 0, dot1, 10), part2 = parseInt(version, dot1 + 1, dot2 < 0 ? version.length() : dot2, 10);
-        return of(part1, part2, dot2 >= 0 ? parseInt(version, dot2 + 1, version.length(), 10) : 0, qualifier);
+        int part1 = parseLeadingInt(version, 0, dot1);
+        int part2 = parseLeadingInt(version, dot1 + 1, dot2 < 0 ? version.length() : dot2);
+        int part3 = dot2 >= 0 ? parseLeadingInt(version, dot2 + 1, version.length()) : 0;
+        return of(part1, part2, part3, qualifier);
+    }
+
+    /**
+     * 文字列の先頭から連続する数字を抽出して int に変換します。
+     * 数字が1つも無い場合は0を返します。
+     */
+    private static int parseLeadingInt(@NotNull String s, int start, int end) {
+        int actualEnd = start;
+        while (actualEnd < end && Character.isDigit(s.charAt(actualEnd))) {
+            actualEnd++;
+        }
+        if (actualEnd == start) {
+            return 0;
+        }
+        return parseInt(s, start, actualEnd, 10);
     }
 
     @NotNull