Spawner types

Spawner types live in two files that share the same format: mob_spawners.yml for mob spawners (SPAWNER blocks) and item_spawners.yml for item spawners (DROPPER blocks). Each type has a free-form name, which is what appears in commands and tab completion.

Example

mob_spawners.yml

elite_zombie:
  entity: ZOMBIE
  experience: "15-25"
  drop_chance: 100
  icon:
    item: IRON_SWORD
  loot:
    1:
      item: IRON_SWORD
      amount: 1
      chance: 8
      durability: "20-80"
    2:
      item: EMERALD
      amount: "1-3"
      chance: 15

This defines a spawner called elite_zombie. Every cycle it gives 15 to 25 experience, has an 8% chance to produce a damaged iron sword and a 15% chance to produce one to three emeralds.

Type fields

Prop

Type

Loot entries

Prop

Type

drop_chance vs chance

drop_chance decides whether the loot table is rolled at all this cycle. Each entry's chance is then checked on its own. A spawner with drop_chance: 50 and an entry with chance: 50 produces that item about a quarter of the time.

Custom items

Any item value, in loot or in an icon, can point at a custom item instead of a vanilla material:

item: EMERALD

Icons

icon.item follows the same rules as loot items. To show a custom player head, set icon.item to PLAYER_HEAD and add icon.skull_texture:

icon:
  item: PLAYER_HEAD
  skull_texture: "<base64 value>"

Use the full value, not the hash

skull_texture must be the complete base64 Value string that head sites such as minecraft-heads.com provide, not just the texture hash. It is ignored unless icon.item is PLAYER_HEAD.

Applying changes

Save the file and run /esp reload. Spawners already placed in the world pick up the new values immediately, because they reference their type by name.