Goryo's Vengeance (Showcase) [Duskmourn: House of Horror Commander]

Cost: 1 B Return target legendary creature card from your graveyard to the battlefield. That creature gains haste. Exile it at the beginning of the next end step.
Splice onto Arcane 2 B (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)