Horobi's Whisper

Instant — Arcane    (CMC:3)

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.)

70 BOK • ENAleksi Briclot

™ & © 1993—2005 Wizards of the Coast

Legal in: Modern,Kamigawa Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Horobi's Whisper {1}{B}{B} Instant — Arcane 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.)

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View this MTG card on Gatherer

2/1/2005
Horobi's Whisper can target a creature even if you don't control a Swamp, but the spell does nothing.
6/7/2013
You reveal all cards you intend to splice at the same time. Each individual card can be spliced only once onto any one spell.
6/7/2013
A card with a splice ability can't be spliced onto itself because the spell is on the stack (and not in your hand) when you reveal the cards you want to splice onto it.
6/7/2013
You choose all targets for the spell after revealing cards you want to splice, including any targets required by the text of any of those cards. You may choose a different target for each instance of the word "target" on the resulting spell.
6/7/2013
If all of the spell's targets are illegal when the spell tries to resolve, it will be countered and none of its effects will happen.

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Card Horobi's Whisper is not on TCGPlayer.