Brachina

Magic Resistance. The brachina has Advantage on saving throws against spells and other magical effects.

Regeneration. The brachina regains 5 Hit Points at the start of each of its turns. If the brachina takes Radiant damage or damage from a silvered weapon, this trait doesn’t function on the brachina's next turn. The brachina dies only if it starts its turn with 0 Hit Points and doesn’t regenerate.

Multiattack. The brachina makes one Draining Touch attack and one Stygian Shortsword attack.

Toxic Shortsword. Melee Attack Roll: +9, reach 5 ft. Hit: 9 (1d6 + 6) Piercing damage plus 9 (2d8) Poison damage.

Draining Touch. Melee Attack Roll: +10, reach 5 ft. Hit: 18 (2d10 + 7) Necrotic damage, and the target's Hit Point Maximum is reduced by half of the Necrotic damage dealt.

Spellcasting. The brachina casts one of the following spells without Material components, using Charisma as the spellcasting ability (spell save DC 18).

At Will: Produce Flame, Clairvoyance, Enthrall

1/Day Each: Plane Shift (self only), Soul Cage

Beguile. The brachina uses Spellcasting to cast Dominate Monster (level 9 version) without spellcasting components.

Shape-Shift. The brachina shape-shifts to resemble a Medium or Small Humanoid or back into its true form. Its game statistics are the same in each form, except its Fly Speed is available only in its true form. Any equipment it’s wearing or carrying isn’t transformed.