Sammaster (Dracolich Form)

If Sammaster fails a saving throw, he can choose to succeed instead.

Creatures within 60 feet of Sammaster can't regain Hit Points.

Sammaster has Advantage on saving throws against spells and other magical effects.

Sammaster has a magical soul gem as his dracolich heart. The gem can't be damaged or removed until he is reduced to 0 Hit Points. If Sammaster is reduced to 0 Hit Points, his dracolich form dissolves to dust. After 1d10 days, he appears in an unoccupied space within 5 feet of his soul gem (so long as the gem still exists), using the Sammaster (Lich Form) stat block. The gem is a Tiny object that has AC 20; HP 50; and Immunity to Acid, Necrotic, Poison, and Psychic damage. The gem regains all its Hit Points at the end of every turn, but it turns to dust if reduced to 0 Hit Points.

Sammaster makes three Rend attacks. He can replace one attack with a use of Spellcasting to cast Blight or Ray Of Sickness (level 6 version).

Melee Attack +14, reach 10 ft. 18 (2d10 + 7) Slashing damage plus 18 (4d8) Necrotic damage.

CON Save DC 20, each creature in a 90-foot Cone [Area Of Effect].
Failure: 52 (8d12) Acid or Necrotic damage (Sammaster's choice).
Success: Half damage.

Sammaster moves up to half his Speed, and he makes one Rend attack.

Sammaster uses Spellcasting to cast Ray Of Sickness (level 6 version).

WIS Save DC 21, each creature in a 20-foot Emanation [Area Of Effect] originating from Sammaster.
Failure: 13 (2d12) Psychic damage, and the target has the Frightened condition until the end of its next turn.
Success or Failure: Sammaster can't take this action again until the start of his next turn.