Healing Factor. At the start of each of it's turns, the [BIRDMAN] restores 2d10 hit points as it self-repairs.
Multiattack. The [BIRDMAN] can make two Hidden Blade attacks, and one Shrapnel Cannon attack.
Enchant Blade. As a bonus action, the [BIRDMAN] can release a strange golden liquid onto it's blades, making them magical and adding 1d6 radiant damage. Lasts until the end of it's turn.
Hidden Blade. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 10 (2d8 + 2) Slashing damage.
Shrapnel Cannon. Ranged Weapon Attack: +5 to hit, range 30 ft. cone. Hit: 10 (1d10 + 5) piercing damage.
Gust. Whenever the [BIRDMAN] loses more than 20 hit points to an attack, everyone within 10 feet of the Stalker must make a dex saving throw (DC 16), else be pushed back another 10 feet by the flapping of it's massive wings.