Razen, Arcane's Blade

Whenever Razen, Arcane's Blade deals combat damage to a player, you may exile up to one target instant or sorcery card from their graveyard. You
may cast that card for as long as it remains exiled,
and you may spend mana as though it were mana of any type to cast it.

{t} Copy target instant or sorcery spell you control. You may choose new targets for the copy.