Hellish Weapons. The adamant's weapon attacks are magical, a celestial creature or descendant of such like an aasimar that touches the weapons automatically takes 2d8 necrotic damage and continues to take 2d8 additional necrotic damage for every turn (6 seconds) that they hold the weapons.

Magic Resistance. The adamant has dvantage on saving throws against spells and other magical effects.

Adept Marksman. The adamant ignores half and three quarters cover and long distances don't have effect on the attack roll. Additionally while using ranged attacks the adamant scores a critical hit on a 18 or above when rolling to hit a creature.

Multiattack. The adamant makes three longbow attacks or two shortsword attacks.

Shortsword. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) slashing damage,  plus 7 (2d6) fire damage.

Longbow. Ranged Weapon Attack: +9 to hit, range 600 ft., one target. Hit: 7 (1d10 + 5) piercing damage. When shooting an arrow the adamant can choose to coat the arrow in one of the following elements: Fire, Cold, Necrotic, Lightning, and deal an extra 3d10 damage of the chosen element.

Wind Barrier(3-6).  The adamant waves her wings with enough power to create a wind barrier, gaining a +5 to her AC only against ranged attacks. The barrier lasts 1d6 rounds. 

Quick Stride. The adamant can take the dash and dodge action as a bonus action when flying.