Minecraft wiki entry for End_portal, associated text: Activating the end portal destroys any blocks located in the center 3×3 square, including bedrock or another end portal frame. It destroys fluids, although if the source block is not also removed, then it immediately flows back through. If an end portal is generated on a spawner, the fire particles remain. The destruction of the blocks does not make any sound, and applicable blocks do not drop as resources (except for the top part of a door and the extended part of a vertical piston, which both destroy the whole object and drop them as resources). Events sometimes triggered by block destruction fail to occur; TNT simply disappears without detonating, and infested blocks fail to spawn a silverfish. However, containers still drop their contents. Mobs (except for the wither and ender dragon) enter the portal similarly to the player. If the player rides a minecart into an active end portal, the player enters the End only after exiting the minecart.