Horobi's Whisper

Instant - Arcane, 1BB (3)
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.)¹
Illus. Aleksi Briclot

Crystal Keep Rulings Summaries

• Note - Also see Instant Type for Arcane, Rule G19.23.
• Note - Also see Splice, Rule 502.40.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/8)	Betrayers of Kamigawa (Common)