Bloodthirsty Bounds. The Adamantasaurus' long jump is up to 35 feet and its high jump is up to 20 feet, with or without a running start.

Adamantine Hide. The Adamantasaurus nullifies the effects of critical hits unless the attack is made with an adamantine weapon.

Crunch. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 35 (4d12 + 5) piercing damage.

Bloody Roll. The Adamantasaurus curls into a ball and rolls towards its prey with devastating force.  Each creature that is within 5 feet of the Adamantasaurus at the end of its movement each turn must succeed on a DC 17 Strength or Dexterity saving throw (target's choice) or be knocked prone and take 15 (3d6 + 5) bludgeoning damage plus 14 (3d6 + 5) slashing damage. On a successful save, the creature takes only half the damage, isn't knocked prone, and is pushed 5 feet out of the Adamantasaurus' space into an unoccupied space of the creature's choice. If no unoccupied space is within range, the creature instead falls prone in the Adamantasaurus' space.