Flight
You have natual flying. flight can only be done in a strait line and must be decided upon before carrying out your turn. to change directions you need 20ft of movment speed to change any direction and cannot change direction mid movment. you cannot fly if incapacatated.

Talons Melee Weapon Attack: Uses strength to hit, reach 5 ft., one target. Hit: (1d8 + 4) slashing damage.
Damage increases by 1 D8 at
Level 6
Level 12
Level 18

Beak Melee Weapon attack: Uses Strength to hit, Reach 5ft, one target. Hit: (1 D6 + 4) Peircing damage.
Damage increases by 1 D6 at Level 6
Level 12
Level 18

Hell's Sight The Owl has advantage on (Perception, Survival) checks that rely on sight.

Hell's Feathers The Hellspawn Owl has resistance to fire and acid damage types, and has weakness to Radiant Damage, Holy objects or paladin equipment burn to the touch and cause 1 D4 Radiant Damage.

Swoop The Owl can only perform the attack action every 2nd turn.

Overwatch At level 1 Delta can ask The Hellspawn Eagle to keep watch over a radius of 2 miles, The eagle will warn Delta of potential threats that he sees and structurs / Land marks. if combat starts while the Eagle is still doing overwatch he can't join combat until after the first round.

Flyby Attack
Prerequisite: Fly speed
At level 3 When flying the creature can make an aditional action The creature must decide on its movment path before deciding to use this ability and must use its full movemnt.
Without this feat, if the creature takes an action while flying its movement speed is reduced to 0 for the remained of its turn.

Sky Master
Prerequisite: Fly speed.
At level 3 When flying you no longer provoke attack of oppitunity from a creature you hit on your turn.
Your maneuverability while flying improves greatly, you can now change direction mid movment and without movment penatelies. You can now also Hover in place and perform a dive while flying, a dive costs no movment to perform and deals 1 D10 force damage on creatures in a 10ft radiance from where you land.

Mounted Combatant
At Level 4 Delta gains the following benifits when mounted on Remington.
You are a dangerous foe to face while mounted. While you are mounted and aren't incapacitated, you gain the following benefits:
You have advantage on melee attack rolls against any unmounted creature that is smaller than your mount.
You can force an attack targeted at your mount to target you instead.
If your mount is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Snatch
Prerequisite: Access to a form with either claws or bite as natural weapons
At level 5 if you hit with a claw or bite attack, you automatically attempt to start a grapple as a free action without provoking an attack of opportunity. If you get a hold with a claw on a creature one or more size categories smaller than yourself, you squeeze each round for automatic claw damage. As a free action, you can drop a creature you have snatched, or you can use a standard action to fling it aside or drop the creature from hight. A flung creature travels 10 feet (and takes 1d6 points of damage) for each size category the creature is above tiny. If you fling a creature while you are flying, it suffers either flinging or falling damage, whichever is greater.

Winds of the 9 Hells
At Level 9 You can flatten targets with blasts of air from your wings.
Prerequisite: The ability to hover, STR 13, fly speed 20 ft, Large size
As an action, you can hover in place and use your wings to create a blast of air in a cone with a radius and maximum height based on your size (Large size 35 feet Radius, strenght sevear)
The wind lasts until your next turn (and you can choose to continue the effect during your next turn). Anyone in or entering the cylinder is affected. Because you are producing a continuous blast of air.
Creatures of Large or smaller size that are affected must make a DC 17 strenght check or be blown away from the sorce of wind by 15ft. creatures larger then Large are unaffected. creatures that are within 5 ft of the source are incapacitated rather then blown away. must finish a short or long rest.

FireStrom
Casting Time 1 action
Range 150 feet
Components V S
Duration Instantaneous
At Level 15. Up to ten 10-foot cubes appear high in the sky and rain down on the surrounding area, Each creature in the area makes a Dexterity save. It takes 5d10 fire damage on a failed save, or half on a success.
The fire damages objects in the area and ignites flammable objects that aren't being worn or carried. If you choose, plant life in the area is unaffected by this spell. must finish a short or long rest.