Multiattack

Two Shortswords and one Dagger or three Psychic Blasts. Can replace one attack with Gasp to Survive if available.

Shortsword

Melee Weapon Attack: +7 to hit, 5 ft., one target, 7 (1d6+4) slashing damage + 10 (3d6) psychic.

Dagger

Melee or Ranged Weapon Attack: +7 to hit 5 ft. or range 20/60' one target 6 (1d4+4) piercing damage + 10 (3d6) psychic.

Psychic Blast

Ranged Spell Attack: +5 to hit, 60 ft., one target, 16 (4d6+2) psychic. If target is currently suffocating from breathstealer's Gasp to Survive breathstealer can choose to deal 1 psychic to target instead.

Gasp to Survive (Recharge 4-6)

Chooses a creature it dealt psychic to within last min. Target: 14 (4d6) psychic and believes it is suffocating including choking and being unable to speak (DC 15 Wis half damage and doesn't believe it is suffocating). At the start of each of suffocating creature's turns it must make a DC 15 Wis save. It has disadvantage on this save if it took psychic since start of its prior turn. If it fails three such saves before succeeding on three such saves it falls unconscious for 1 hr returns to breathing normally and stops making this save. On its third successful save effect ends for the creature.