Roc is a Gargantuan monstrosity with unaligned alignment and Challenge Rating 11 in the 2024 SRD. This stat block includes AC 15, 248 hit points, speeds, traits, and actions.
Multiattack - The roc makes two Beak attacks. It can replace one attack with a Talons attack.
Beak - Melee Attack Roll: +13, reach 10 ft. Hit: 28 (3d12 + 9) Piercing damage.
Talons - Melee Attack Roll: +13, reach 5 ft. Hit: 23 (4d6 + 9) Slashing damage. If the target is a Huge or smaller creature, it has the Grappled condition (escape DC 19) from both talons, and it has the Restrained condition until the grapple ends.