Multiattack. Ogruhl makes three attacks: one with its bite and two with its claws. It can make one tail attack in place of its two claw attacks.
Bite. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit:26 (3d12 + 7) piercing damage.
Claw. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit:16 (2d8 + 7) slashing damage.
Tail. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit:26 (3d12 + 7) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be pushed up to 10 feet away from Ogruhl and knocked prone.
Sand Breath (Recharge 5–6). Ogruhl exhales abrasive sand in a 60-foot cone. Each creature in that area must make a DC 18 Constitution saving throw, taking 52 (15d6) slashing damage on a failed save, or half as much damage on a successful one.
Ogruhl has been trapped here for millennia, restrained by magic chains. Ogruhl was the prisoner of a cruel Netherese wizard. When the city around the tortoise was abandoned, Ogruhl was left to die. A band of chwingas found the tortoise and brought it food and water little by little to keep it alive. Over time, the chwingas and Ogruhl developed a symbiotic relationship—it defended them and provided a home for them, and they helped it to survive.