Aegisaurus

Tail. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 19 (4d6 + 5) bludgeoning damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone.

Armored Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage + 4 (1d8) piercing damage.

Bellow (Recharge 6). The aegisaur lets out a triumphant bellow. The aegisaur and up to four of its allies or nonhostile creatures within 50 feet of it that can hear it gain a +2 bonus to their attack and damage rolls.

Aggressive (Recharge 4-6). The aegisaour can move up to half its speed toward a hostile creature it can see.