Dinosaur, Thundercall Hadrosaur

Siege Monster. Double damage to objects/structures.

Multiattack. Three Slam attacks.

Slam. Melee Weapon Attack: +11 to hit, 10 ft., one target, 23 (3d10+7) bludgeoning damage and the target must make DC 16 Str save or be knocked prone.

Thunderous Bellow (Recharge 5-6). The thundercall hadrosaur unleashes a ground-shattering bellow in a 120' cone. All in area make a DC 16 Con save. On a failure a creature takes 38 (7d10) thunder and is knocked prone. On a success a creature takes half the damage and isn't knocked prone.

Sonic Shield. The hadrosaur adds 4 to its AC vs. one ranged attack that would hit it. To do so the hadrosaur must see the attacker and not be in an area of magical silence.