Ak-Baba

Keen Sight. The Ak-Baba has advantage on Wisdom (Perception) checks that rely on sight

Massive Gust. The Ak-Baba can flap its wings as a bonus action on its turn. If it does, any creature 60ft. in front of it must make a Dexterity saving throw (DC 13) or be knocked Prone.

Shadowlord's Servant. The Ak-Babe has a direct link to the mind of the Enemy. As long as the Enemy is focusing and exerting its Will, he can choose to voerride the Ak-Baba's mind and control it. Controlling the Ak-Baba in this way forces it beyond its limits and allows it to use a bonus action once per turn.
This link is severed if the Ak-Babe is dealt more than 70 damage in one turn. The Ak-Baba gains 2 levels of exhaustion immediately once the link is severed.

Multiattack. The Ak-Babe makes two attacks: one with its beak and one with its talons.

Beak. Melee Weapon Attack: +13 to hit, reach 10ft., one target. Hit: 27 (4d8 + 9) piercing damage.

Talons. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 23 (4d6 + 9) slashing damage, and the targed is grappled (escape DC 19). Until this grapple ends, the target is restrained, and the roc can't use its talons on another target.

Shadow Rush. If the Enemy is enforcing his Will, he can force the Ak-Baba to Dash as a bonus action.

Shadow Grasp. If the Enemy is enforcing his Will, he can force the Ak-Baba to make a Talon attack as a bonus action. The talon momentarily wreathes itself in dark energy once it connects. If grappled in this way, the attack also deals an additional 9 (2d6) necrotic damage every turn.

Shadow Siphon. If the Enemy is enforcing his Will, and is within 300 ft., he can force the Ak-Baba to take 32 (2d20) necrotic damage. The Enemy then regains hit points for half the damage dealt. If the Ak-Baba would be reduced to 0 hp, it instead drops to 1 hp.