AC 15 (natural armor)
HP 32 (5d12; bloodied 16)
Speed 30 ft., swim 30 ft.
Proficiency +2; Maneuver DC 12
Skills Stealth +4
Senses blindsight 30 ft., passive Perception 9
Amphibious. The crab can breathe air and water.
Multiattack. The lance crab makes two claw attacks
Claw. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 5 (1d8 + 1) bludgeoning damage and the target is grappled (escape DC 12). The crab has two claws and can grapple one creature with each.
Spine Barrage (2/day). The lance crab flicks its shell upwards, sending a number of its spines arcing towards its enemy. A 5-foot-radius area within 30 feet is pelted with falling spines. Each creature in the area makes a DC 12 Dexterity saving throw , taking 9 (2d6 + 2) piercing damage on a failed save or half damage on a success. On a failure, the creature is also slowed until the end of its next turn as it attempts to free itself from the spines.
Lance crabs are a particularly dangerous denizen of the western shore, moving in groups as large as ten individuals. In addition to a natural aggressiveness that drives them attack anything they can eat, these crustaceans have a series of spines growing forward from the rear of their shells that can be launched at their prey.
Beasts are natural animals whose existence and abilities are nonmagical. A bear and a tyrannosaurus rex are both beasts.