Spikeball

Spikeballs are a common hazard located in the Corpse. They float back and forth on a fixed axis either horizontally or vertically, doing contact damage. Only rocks, the edges of the room, and other Spikeballs can obstruct their path and make them turn the other way; however, gaps and spikes will just be flown over. Spikeballs can not be killed and will continue to move even if the room is cleared.