Hamsa

Hamsa is a large fractal hand built around teleporting the player to Firmament. It teleports around the player, rings bells, and only becomes dangerous when it decides to commit.

While idle, it jumps between positions up to about 50 blocks away. In Naraka it sometimes converts that pattern into a chase. When that happens, time slows, the hand closes in directly, and touching it sends the player to Firmament.

That teleport is the whole mechanic. Killing a Hamsa gives a hand wand, but most players remember it as the thing that drags them out of an ordinary world biome into Firmament.