Roc

Keen Sight. The roc has advantage on Perception checks that rely on sight.

Siege Monster. The roc deals double damage to objects and structures.

Multiattack. The roc attacks once with its beak and once with its talons or makes a beak attack and drops a grappled creature or held object.

Beak. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 23 (4d6+9) piercing damage.

Talons. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 23 (4d6+9) slashing damage and the target is grappled (escape DC 22). Until this grapple ends the target is restrained and the roc can't attack a different target with its talons.

Retributive Strike. When a creature the roc can see hits it with a melee weapon attack, the roc makes a beak attack against its attacker.