Wrexial, the Awoken

Islandwalk, swampwalk
At the beginning of your upkeep reveal the top of your library. If an instant or sorcery card is revealed this way, put that card into your graveyard. Otherwise, put that card into your hand.
Whenever Wrexial, the Awoken deals combat damage to an opponent, you may cast target instant or sorcery card from your graveyard without paying its mana cost until end of turn. Exile that card.