Minecraft wiki entry for Blaze, associated text: Blazes fly, although when not attacking they stay on the ground or sink down slowly through the air. Blazes attempt to swim upward in lava or water. When idle, they will fall through lava and water. Despite taking damage from water, blazes make no attempt to protect themselves if pushed or dropped into water. Their pathfinding does not avoid fire or lava‌[Java Edition only] but does avoid water. They immediately take damage from powder snow.