Minecraft wiki entry for Drowned_farming, associated text: An aerial spawning platform offers a way to farm naturally-spawned drowned, which can drop tridents when killed by the player. Like the flooded dungeon above, the most basic survival-mode aerial drowned farm doesn't require exotic materials, but it requires a large quantity of common materials such as cobblestone, water, and glass. You'll also need some slabs, wooden buttons or signs to control water flow, as well as a hopper and a chest.