Black Talon

Magic Resistance.  The Black Talon has advantage on saving throws against spells and other magical effects.

Natural Stealth. The Black Talons scales allow it hide in shadows perfectly. A DC 20 Perception is required to sense a Black Talon is in the area otherwise it gains initiative in addition to advantage on its first attack. 

Fear Aura. Any creature hostile to the black talon that sees it must make a saving throw a DC 18 Wisdom saving throw, unless the black talon is incapacitated. On a failed save, the creature is frightened until the start of its next turn. If a creature's saving throw is successful, the creature is immune to the black talon's Fear Aura for the next 24 hours.

Death Echo. Upon the death of a black talon it releases a devastating roar. Any creature within a 25 ft. radius must succeed on a DC 20 Constitution saving throw or take 32 (5d8+10) psychic damage and be rendered unconscious. If a creature's saving throw is successful they take half damage and are disoriented for 1d6 hours causing disadvantage on attack rolls. 

Multiattack. The Black Talon can make four attacks: one with its bite, two with its claws (or talons if out) or two with its bladed wings and one with its tail.

Bite. Melee Weapon Attack:  +15 to hit, reach 10 ft., one target. Hit:  26 (4d8 + 8) piercing damage. The target must succeed on a DC 22 Constitution saving throw or become poisoned. While poisoned in this way, the target can't regain hit points, and it takes 22 (5d8) poison damage at the start of each of its turns. The poisoned target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If the target reaches 0 hp due to the poison they die and can only be revived by the 7th level resurrection spell. 

Claw. Melee Weapon Attack:  +15 to hit, reach 15 ft., one target. Hit:  19 (2d10 + 8) slashing damage. 

Wing. Melee Weapon Attack:  +8 to hit, reach 15 ft., one target. Hit:  19 (3d10 + 1) slashing damage. The target much succeed on a DC 20 Constitution or suffer 1d10 damage per round from bleeding out. 

Tail. Melee Weapon Attack:  +15 to hit, reach 10 ft., one target. Hit:  21 (3d8 + 8) bludgeoning damage. 

Talon. Melee Weapon Attack:  +15 to hit, reach 15 ft., one target. Hit:  27 (3d12 + 8) piercing damage. The target much succeed on a DC 18 strength or be impaled (grappled).

Acid Breath (Recharge 6). The Black Talon can exhale acid in a 15-foot line that is 5 ft. wide. Each creature in that line must make a DC 15 Dexterity saving throw, taking 27 (6d8) acid damage on a failed save, or half as much damage on a successful one.

Hatred of Purity. The black talon hates any creatures of good alignment and will always focus its first attacks on creatures with good alignment in particular lawful-good. Black Talons despise paladins and clerics of good alignment most of all.