A skeleton spawner is a cage-like block in Minecraft that constantly spawns skeletons nearby. These spawners are usually found in underground dungeons made of cobblestone and mossy cobblestone. The spawner glows softly and shows a spinning skeleton inside.

Skeletons spawn every few seconds if the area around the spawner is dark enough and there’s space for them to appear. Players use these spawners to build farms where they can collect bones and arrows automatically. By placing torches around the spawner, you can stop it from spawning mobs, or you can break it to remove it completely.

Skeleton spawners are a popular way on DonutSMP to gather bones and arrows fast while gaining experience.