Paralyzing Touch.ms 15 to hit, reach 5 ft., one creature. ({@damage 3d6) cold damage, and the target must succeed on a 20 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Staff (+3 Quarterstaff).mw 11 to hit, reach 5 ft., one target. ({@damage 1d6 + 4) bludgeoning damage plus 10 (3d6) necrotic damage, or 8 (1d8 + 4) bludgeoning damage plus 10 (3d6) necrotic damage when used with two hands.
Invoke Curse.While holding the Staff of the Forgotten One, Acererak expends 1 charge from it and targets one creature he can see within 60 feet of him. The target must succeed on a 23 Constitution saving throw or be cursed. Until the curse is ended, the target can't regain hit points and has vulnerability to necrotic damage. Greater restoration, remove curse, or similar magic ends the curse on the target.
Legendary Actions.The creature can take 3 legendary actions...
At-Will Spell.Acererak casts one of his at-will spells.
Melee Attack.Acererak uses Paralyzing Touch or makes one melee attack with his staff.
Frightening Gaze (Costs 2 Actions).Acererak fixes his gaze on one creature he can see within 10 feet of him. The target must succeed on a 20 Wisdom saving throw against this magic or become frightened for 1 minute. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target's saving throw is successful or the effect ends for it, the target its immune to Acererak's gaze for the next 24 hours.
Talisman of the Sphere (Costs 2 Actions).Acererak uses his Talisman of the Sphere to move the Sphere of Annihilation under his control up to 90 feet.
Disrupt Life (Costs 3 Actions).Each creature within 20 feet of Acererak must make a 20 Constitution saving throw against this magic, taking 42 (12d6) necrotic damage on a failed save, or half as much damage on a successful one.