Amargasaurus

Hulking Sweep.

When the Amargasaurus makes a Tail Sweep attack against a creature of medium size or smaller, it can use its bonus action to force the target to make a DC 13 strength saving throw or be knocked back 10 ft.

Tail Sweep. Melee Weapon Attack: +8 to hit, reach 10 ft., 1 target. Hit: 19 (4d6 + 5) [Bludgeoning] damage. 

Stomp. Melee Weapon Attack: +8 to hit, reach 5 ft, 1 target. Hit:  23 (4d8+5) [Bludgeoning] damage

Gilawan's Protection.

*When this creature or a creature near this creature is hit with an attack

A spiritual ray of light protects the creature being attacked, granting them +3 AC until the start of that creatures next turn. This also prevents all damage from magic missile. 

This reaction can only be made 2 times per day