Levi, the Abysswalker

Deathtouch
When Levi, the Abysswalker deals combat damage
to a player, you may pay {3}{u/r}{u/r}. If you do,
you may cast target instant or sorcery card with
mana value 3 or less from your graveyard
without paying its mana cost.
If that spell would be put into your graveyard,
exile it instead.