Minecraft wiki entry for Defeating_the_wither, associated text: This method is easy to pull off in Bedrock Edition, where the withers can't be immobilized by pushing it into bedrock. It works by getting the wither up into an uneven bedrock ceiling, where it cannot hit the player, but they can hit the Wither. This method is much easier than a regular wither fight, and they can do it without potions or apples.