MobStackerSystem [1.20 - 1.21] icon

MobStackerSystem [1.20 - 1.21] -----

High-performance mob stacking with per-chunk limits and full drop support.

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OnlySyntax Icon.png MobStacker is an ultra-fast ⚡ extremely stable ⚡ and highly optimized mob stacking system for Paper/Pufferfish 1.21+.

It keeps the full vanilla feeling ✨ normal drops, normal XP, normal animations ✨

while reducing mob lag in every chunk to an absolute minimum ⏳

⚡ Features
• Supports all living and spawnable mobs ✨
• Per-mob configuration in mobstacker.json
• Adjustable maximum stack size ⚡
• Adjustable maximum mob count per chunk ⏳
• 100% vanilla drops and XP ✨
• Clean stack-down behavior when killing mobs (10x → 9x → …)
• Automatic unstacking when config values change ⏳
• Fully customizable name tags
• Name tags only visible when players are in the chunk or have line of sight ✨
• World blacklist for full control

⏳ Performance
• Highly optimized chunk mob calculations
• Extremely low CPU usage ⚡
• Efficient name-tag update intervals
• No duplication bugs, no missing drops, no exploits ✨
• No console spam
• Minimal RAM usage ⏳
• Perfect for servers with 100+ players

✨ Benefits
• Significantly reduced lag in farms and spawn-heavy areas
• Stable TPS even with many mobs ⚡
• Players feel no difference – full vanilla gameplay preserved ✨

Code (YAML):
{
  "maxStackSize" : 16,
  "maxChunkMobs" : 100,
  "displayFormat" : "§7{name} §a{amount}§7x",
  "mobs" : {
    "ALLAY" : true,
    "ARMADILLO" : true,
    "ARMOR_STAND" : true,
    "AXOLOTL" : true,
    "BAT" : true,
    "BEE" : true,
    "BLAZE" : true,
    "BOGGED" : true,
    "BREEZE" : true,
    "CAMEL" : true,
    "CAT" : true,
    "CAVE_SPIDER" : true,
    "CHICKEN" : true,
    "COD" : true,
    "COW" : true,
    "CREAKING" : true,
    "CREEPER" : true,
    "DOLPHIN" : true,
    "DONKEY" : true,
    "DROWNED" : true,
    "ELDER_GUARDIAN" : true,
    "ENDER_DRAGON" : true,
    "ENDERMAN" : true,
    "ENDERMITE" : true,
    "EVOKER" : true,
    "FOX" : true,
    "FROG" : true,
    "GHAST" : true,
    "GIANT" : true,
    "GLOW_SQUID" : true,
    "GOAT" : true,
    "GUARDIAN" : true,
    "HAPPY_GHAST" : true,
    "HOGLIN" : true,
    "HORSE" : true,
    "HUSK" : true,
    "ILLUSIONER" : true,
    "IRON_GOLEM" : true,
    "LLAMA" : true,
    "MAGMA_CUBE" : true,
    "MOOSHROOM" : true,
    "MULE" : true,
    "OCELOT" : true,
    "PANDA" : true,
    "PARROT" : true,
    "PHANTOM" : true,
    "PIG" : true,
    "PIGLIN" : true,
    "PIGLIN_BRUTE" : true,
    "PILLAGER" : true,
    "POLAR_BEAR" : true,
    "PUFFERFISH" : true,
    "RABBIT" : true,
    "RAVAGER" : true,
    "SALMON" : true,
    "SHEEP" : true,
    "SHULKER" : true,
    "SILVERFISH" : true,
    "SKELETON" : true,
    "SKELETON_HORSE" : true,
    "SLIME" : true,
    "SNIFFER" : true,
    "SNOW_GOLEM" : true,
    "SPIDER" : true,
    "SQUID" : true,
    "STRAY" : true,
    "STRIDER" : true,
    "TADPOLE" : true,
    "TRADER_LLAMA" : true,
    "TROPICAL_FISH" : true,
    "TURTLE" : true,
    "VEX" : true,
    "VILLAGER" : true,
    "VINDICATOR" : true,
    "WANDERING_TRADER" : true,
    "WARDEN" : true,
    "WITCH" : true,
    "WITHER" : true,
    "WITHER_SKELETON" : true,
    "WOLF" : true,
    "ZOGLIN" : true,
    "ZOMBIE" : true,
    "ZOMBIE_HORSE" : true,
    "ZOMBIE_VILLAGER" : true,
    "ZOMBIFIED_PIGLIN" : true
  },
  "worldBlacklistEnabled" : false,
  "worldBlacklist" : [ ],
  "nameTagUpdateIntervalTicks" : 60,
  "partialNameTagUpdates" : true,
  "useLineOfSightForNameTags" : true,
  "useChunkMobCountCache" : true
}
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Resource Information
Author:
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Total Downloads: 26
First Release: Nov 25, 2025
Last Update: Yesterday at 10:57 PM
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