No condition that makes use of an "entity" source functions. This includes:
- minecraft:bred_animals trigger.
- minecraft:player_damaged trigger.
- minecraft:summoned_entity trigger.
- minecraft:player_killed_entity trigger.
Given the example advancement, placed in world/data/advancements/custom/cow.json:
And the following command to test it at will (see
MC-115064 for namespace issue):
Breeding two cows to create a calf will not fulfill the condition, showing no errors. The same occurs with the parents array, though they would likely both be fixed at the same time.