Sky Warden

Prerequisite: Aarakocra
You are trained for both scouting the skies and aerial
combat. You gain the following benefits:
• Increase your Dexterity or Wisdom score by 1, to a
maximum of 20.
• You gain proficiency in the Perception skill if you don’t
already have it. You add double your proficiency bonus
to Perception checks that rely on sight.
• Once per turn, if you are flying and dive at least 30
feet straight toward a target and then hit it with a
melee weapon attack, the attack deals an extra 1d6
damage to the target.

From XGE Bonus- Expanded Racial Feats