Draugr Necromancer

Whenever a nontoken creature an opponent controls dies, you may exile that creature until Draugr Necromancer leaves the battlefield.

{t}: You may cast a spell from among cards exiled with Draugr Necromancer for their mana cost.

{1}, Pay 2 life: Add 1 mana of any color to your
mana pool. Use this mana only to cast spells exiled with Draugr Necromancer.