A 20 foot biomechanical creature from space looking like a robotic Rex

Multiattack. The tyrannosaurus makes two attacks: one physical and one fire ball against a target.

Bite:  The Zord is able to bite one target reach 10 ft., damage is (4d12 + 7) piercing damage. If the target is a large or smaller creature, it is grappled (escape DC 17). Until this grapple ends, the target is restrained and the tyrannosaurus can't bite another target.

Tail: The Zord whips around quickly smashing it's tail against a target in a 20 foot line. (3d8 + 6); bludgeoning damage.

FireBall: A bright streak flashes from your Zord's mouth to a point you choose within range and then blossoms with a low roar into an explosion of flame. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. Targets takes (3d6+6); fire damage on a failed save, or half as much damage on a successful one.