Grave Worm

Grave Worm is a ranged Boneyard enemy that attacks from up to 5 tiles away. When struck, it digs underground rather than absorbing the hit, burrowing out of reach and resurfacing elsewhere — a defensive ability that also lets it ignore tile-based traps like bear traps entirely. It leaves no corpse when defeated. With 10 HP and 4 damage, it is not especially durable, but its evasive burrowing makes pinning it down a challenge.