Easy Mob Farm supports fully customizable loot tables for each captured mob using a * directory-based priority system*.
This allows modpack creators and mod developers to define specific drops for individual mobs with fine-grained control over how those drops interact with vanilla loot.

Custom loot tables are organized by directory name which determines their behavior:

data/easy_mob_farm/loot_tables/entities/
├── overwrite/     # Completely replaces vanilla loot (ignores vanilla drops)
├── priority/      # Uses custom first, falls back to vanilla if custom is empty
├── bonus/         # Adds extra drops on top of vanilla loot
└── fallback/      # Only used when vanilla loot table is empty (legacy behavior)

1. Check overwrite/ → if exists, use only that and stop
2. Check priority/ → add drops if exists
3. Add vanilla drops
4. Check bonus/ → add drops if exists (combines with priority + vanilla)
5. If still empty → check fallback/ for legacy support

data/easy_mob_farm/loot_tables/entities/<mode>/<namespace>/<entity_name>.json

• <mode>: One of overwrite, priority, bonus, or fallback
• <namespace>: The namespace of the entity's mod (e.g. minecraft, iceandfire)
• <entity_name>: The entity's registry name (e.g. zombie, fire_dragon)

• Custom loot tables use standard Minecraft JSON format.
• Any item, including modded items, can be defined in drops.
• Conditions like random_chance and set_count are supported.
• Use set_count function to control loot amounts instead of global multipliers.

To fix the issue where Ender Cataclysm's Ignis drops too many Igneum ingots:

File: data/easy_mob_farm/loot_tables/entities/overwrite/cataclysm/ignis.json

{
  "type": "minecraft:entity",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "item",
          "name": "cataclysm:ignitium_ingot",
          "functions": [
            {
              "function": "minecraft:set_count",
              "count": {
                "min": 1,
                "max": 3
              }
            }
          ],
          "conditions": [
            {"condition": "minecraft:random_chance", "chance": 0.4}
          ]
        }
      ]
    }
  ]
}

This completely replaces vanilla Ignis drops with a controlled amount (1-3 ingots, 40% chance).

Try custom drops first, but fall back to vanilla if custom returns nothing:

File: data/easy_mob_farm/loot_tables/entities/priority/minecraft/zombie.json

{
  "type": "minecraft:entity",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "item",
          "name": "minecraft:rotten_flesh",
          "functions": [
            {
              "function": "minecraft:set_count",
              "count": {
                "min": 2,
                "max": 4
              }
            }
          ]
        }
      ]
    }
  ]
}

Add farm-specific bonus drops on top of vanilla beef/leather:

File: data/easy_mob_farm/loot_tables/entities/bonus/minecraft/cow.json

{
  "type": "minecraft:entity",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "item",
          "name": "minecraft:leather",
          "conditions": [
            {"condition": "minecraft:random_chance", "chance": 0.3}
          ]
        }
      ]
    }
  ]
}

This gives a 30% chance for extra leather in addition to normal cow drops.

For modded entities with no vanilla loot table:

File: data/easy_mob_farm/loot_tables/entities/fallback/iceandfire/fire_dragon.json

{
  "type": "minecraft:entity",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "item",
          "name": "iceandfire:dragonbone"
        },
        {
          "type": "item",
          "name": "iceandfire:fire_dragon_flesh",
          "conditions": [
            {"condition": "minecraft:random_chance", "chance": 0.8}
          ]
        },
        {
          "type": "item",
          "name": "iceandfire:dragonscales_red",
          "conditions": [
            {"condition": "minecraft:random_chance", "chance": 0.6}
          ]
        },
        {
          "type": "item",
          "name": "iceandfire:fire_dragon_blood",
          "conditions": [
            {"condition": "minecraft:random_chance", "chance": 0.35}
          ]
        }
      ]
    }
  ]
}

Use Minecraft's built-in set_count function to adjust drop quantities:

{
  "type": "item",
  "name": "minecraft:diamond",
  "functions": [
    {
      "function": "minecraft:set_count",
      "count": {
        "min": 1,
        "max": 5
      }
    }
  ]
}

Combine with random_chance to reduce drop frequency:

{
  "type": "item",
  "name": "minecraft:emerald",
  "conditions": [
    {"condition": "minecraft:random_chance", "chance": 0.2}
  ]
}

This gives a 20% chance to drop the item - perfect for "more frequent harvests with fewer items per cycle" gameplay.

If you have existing loot tables at the old path:

Old: data/easy_mob_farm/loot_tables/entities/<namespace>/<entity>.json
New: data/easy_mob_farm/loot_tables/entities/fallback/<namespace>/<entity>.json

Simply move your files into the fallback/ subdirectory. The old path is still supported with a deprecation warning.

If your custom loot table does not seem to work:

• ✅ Verify the file is in the correct mode directory (overwrite/, priority/, bonus/, or fallback/)
• ✅ Ensure the JSON syntax is valid with at least "type" and "pools"
• ✅ Check Minecraft logs with debug mode enabled

When using mode-based loot tables:

Using overwrite loot table for EntityType{minecraft:zombie}
Using priority loot table for EntityType{minecraft:creeper}
Using bonus loot table for EntityType{minecraft:cow}
Using fallback loot table for EntityType{iceandfire:fire_dragon}
Using legacy loot table path easy_mob_farm:entities/minecraft/ender_dragon - please move to entities/fallback/

If malformed:

Couldn't parse loot table easy_mob_farm:entities/overwrite/...
Expected name to be an item, was unknown string '...'

• ✅ Four modes: overwrite, priority, bonus, fallback
• ✅ Directory-based system - no config files needed
• ✅ Modes can combine (priority + vanilla + bonus)
• ✅ Use set_count for quantity control
• ✅ Use random_chance for drop frequency
• ✅ No mod integration required - works via datapacks
• ✅ Fully supports modded items and conditions