Chainer's Torment [Dominaria]

Set: Dominaria Type: Enchantment — Saga Uncommon Cost: {3}{B} (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II — Chainer's Torment deals 2 damage to each opponent and you gain 2 life. III — Create an X/X black Nightmare Horror creature token, where X is half your life total, rounded up. It deals X damage to you.