Modern Masters

Horobi's Whisper

If you control a Swamp, destroy target nonblack creature.
Splice onto Arcane—
Exile four cards from your graveyard. (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.)

If you control a Swamp, destroy target nonblack creature.
Splice onto Arcane—Exile four cards from your graveyard. (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.)

Betrayers of Kamigawa

If you control a Swamp, destroy target nonblack creature.
Splice onto Arcane—
Remove four cards in your graveyard from the game. (As you play 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.)