Minecraft wiki entry for Loot_table, associated text: The JSON files go in this folder. Vanilla loot tables are grouped into 4 categories: gameplay (fishing), entities, blocks, and chests, with some tables being in subfolders of those. For example, the file for zombies would go in datapacks/pack name/data/minecraft/loot_tables/entities/zombie.json. This makes every zombie in that world use the datapack's loot table rather than the default zombie loot table.