Graveshell

The graveshell is a dangerous predator that draws scavengers and explorers into its grasp using a morbid lure: the corpse of a former victim impaled upon the spikes that protrude from its large, turtle-like shell. Aside from its shell, the monster resembles no known animal. Small but bright yellow eyes watch from the sagging flesh of its head, the most prominent feature of which is a curiously shaped, toothy maw twisted into a perpetual grin. Its stubby arms and legs are impractical for both walking and swimming, though the algae-caked claws tipping each limb are deadly weapons.

Graveshells are intelligent-a fact that surprises many who encounter them-and surrender rather than fight to the death. These monsters have little to offer in exchange for their lives, though the waterlogged treasures on their collection of corpses may entice opportunists.