Champion Revali

Rito Accuracy. When flying, Revali gains an extra +3 to hit for any bow attack.

Evasive Maneuvers.  Revali gains an extra +3 to his AC while in flight, however, should he take damage that is not radiant, slashing, cold, poison or acid, he will be destablised and lose his Evasive Maneuvers trait for that turn.

In-Flight Reflex(only applies if Evasive Maneuvers is active).  Revali is able to dodge magic missile. When a player casts magic missile, they are to roll a d20 per projectile as if making a normal ranged spell attack. If they do not beat Revali's AC, he dodges the missile. 

Champion of Vah Medoh. Revali can communicate and order Divine Beast Vah Medoh, as long as he is within 900ft of the Divine Beast.

Multiattack.  Revali makes one bomb arrow and one normal bow attack, but only when airborne.

Bomb Arrow Attack (6/short rest). Ranged Weapon Attack: +7 to hit, range 120/600 ft., up to 3 targets. Hit:  26 (6d8+6) [fire] damage. Revali releases three bomb arrows, each creature within a 20ft radius of the impact zone must make a  DC: 15 Dexterity saving throw or take 26 (6d8+6) fire damage on a failed saving throw, or half as much on a saved one. This attack cannot be used if Revali is wet or it is raining. 

Great Eagle Bow Attack. Ranged Weapon Attack: +7 to hit, range 120/600 ft., up to 3 targets. Hit: 18 (3d8 + 6) [piercing] damage.

Revali's Gale. In a burst, a thick column of air surrounds Revali and he ascends 90ft into the air, also applying his Rito Accuracy and Evasive Maneuvers  trait.