Minecraft wiki entry for Drowned_farming, associated text: An aerial farm is probably the most practical way to farm tridents. It works by spawning drowned naturally on an aerial platform at least 24 blocks above the player, with the player being beyond the maximum spawning range of any other spawnable surface in the world. The drowned spawn naturally under the correct conditions of being underwater at light level zero, and they are funneled first into an intermediate area to prevent lethal fall damage, before dropping into the killing chamber where the player waits. The farm described here takes advantage of a mechanic in Bedrock Edition whereby a single layer of water causes an increasing reduction of light level with depth below that layer; the drowned spawn on a wet platform some distance under a glass-bottomed pool of water. In Java Edition, two layers of water may be needed for the platform to spawn drowned.