Minecraft wiki entry for Mob_grinder, associated text: Trident killers provide a way to get large amounts of player-kill loot and experience from a farm without the need for repetitive clicking and travel between different kill locations. Many Bedrock mob farms are much less productive than their Java counterparts due to differences in the spawning algorithms. Moreover, since Bedrock Edition does not have the sweep attack it can be difficult to kill large quantities of mobs manually with a sword. Players may therefore wish to enhance the effectiveness of their farms by limiting the distance mobs must travel before being killed, and by using the looting enchantment while still killing mobs automatically. Trident killers make this possible. They allow for remote player kills in small, separated modules of a farm, and they allow the player to get the looting buff on those kills. On top of these beneifts, tridents in trident killers never despawn. Tridents decrease in durability only when they are thrown. Because the trident is thrown only once, a trident killer can run indefinitely without needing to be supplemented with additional tridents.