Minecraft wiki entry for Drowned_farming, associated text: To speed things up, the drowned need to face the hole. One way to do accomplish this is to find a turtle egg. Unfortunately, once you find a turtle egg, retrieving it requires a pickaxe enchanted with Silk Touch, which may not be available easily in survival. If you can get a turtle egg, your spawning platform should have a 3×3 hole in the center with a block suspended in the middle, connected to the edge of the hole by trapdoors in the open position so that drowned are fooled into thinking they can pathfind to the egg to trample on it. Instead, they fall through the trapdoors. The turtle egg doesn't hatch unless it's on sand. Drowned are not automatically attracted to turtle eggs; they must happen to look in the right direction first, but once a drowned sees it and can find a path to it, the drowned goes for it and falls through the hole.