Oracle

Instant 

Counter target spell. Clash with an opponent. If you win, at the beginning of your next main phase, you may add an amount of C equal to that spell's converted mana cost. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher converted mana cost.)

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

10/1/2007
You decide whether or not to add that much C to your mana pool as the delayed triggered ability resolves at the beginning of your next main phase. You don’t decide before then.

10/1/2007
You can’t add just some of the mana to your mana pool. You either add all the mana to your mana pool or none of it.

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