Aarakocra Skyhunter

If the aarakocra is flying and dives at least 20 feet straight toward a target and then hits it with a melee weapon attack, the attack scores a critical on an 19 or 20.

If the aarakocra starts its turn grappled, it takes 9 (2d8) bludgeoning damage and has disadvantage on attack rolls until the beginning of its next turn.

The aarakocra makes three attacks with its flight lance.

Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 9 (1d12 + 3) slashing damage. On a critical hit, the target is knocked prone if it is a medium or smaller creature.

As a reaction to taking damage from a melee attack, the aarakocra moves up to half its fly speed without provoking attacks of opportunity.