Cometshrike

Legendary Actions (3/Day). If the cometshrike fails a saving throw, it can choose to succeed instead.

Siege Monster. The cometshrike's attacks deal double damage to structures and objects.

Spider Climb. The cometshrike can climb up sheer walls and across ceilings with ease.

Flyby. The cometshrike does not provoke opportunity attacks when it flies out of an enemy's reach.

Shrieking Momentum. If the cometshrike moves in a straight line before hitting a creature with a wing razor attack, it can add an additional 5 (1d8) slashing damage to the attack for every 10 feet it moved (max of 5d8).

High Velocity. If the cometshrike moves at least 20 feet in a straight line, during which it moves within 10 feet of a creature and flies past it, the creature must make a DC 19 Strength saving throw. On a failed save, the target is pulled 10 feet in the direction the cometshrike is moving and knocked prone. On a success, they are not pulled or knocked prone.

Multiattack. The cometshrike makes three attacks, only one of which can be a Bite.

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 18 (2d10 + 7) piercing damage plus 9 (2d8) fire damage.

Wing Razor. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. 12 (1d8 + 7) slashing damage plus 9 (2d8) lightning damage.

Plasma Bolt. Dexterity Saving Throw: DC 16, each creature in a 10-foot sphere within 150 feet. Failure: 14 (3d8) fire damage plus 14 (3d8) lightning damage. Success: Half damage.

Meteor Dive (Recharge 5-6). The cometshrike must dive at least 60 feet straight down to a point of impact of its choice. Dexterity Saving Throw: DC 19, each creature within 30 feet of the cometshrike's impact zone. Failure: 23 (5d8) fire damage and 23 (5d8) lightning damage. The creature is knocked prone and is Burning (2d8). Success: Half damage, and the target is knocked prone or inflicted with Burning.

Speed Demon. The cometshrike can move up to half its speed as a Bonus Action.

Legendary Action Uses: 3. Immediately after another creature’s turn, the cometshrike can expend a use to take one of the following actions. The cometshrike regains all expended uses at the start of each of its turns.

Attack. The cometshrike makes a melee attack.

Plasma Bolt (Costs 2). The cometshrike makes a Plasma Bolt attack.

Nova Burst (Costs 3). Dexterity Saving Throw: DC 16, each creature within 20 feet of the cometshrike. Failure: 18 (5d6) fire damage and 18 (5d6) lightning damage. Success: Half damage.