Oracle

Sorcery 

Target opponent reveals their hand. You may copy an instant or sorcery card in it. If you do, you may cast the copy without paying its mana cost.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

12/1/2004
Reversal of Fortune creates a copy of the card in the other player’s hand, then allows you to cast the copy from that player’s hand without paying its mana cost.

12/1/2004
You cast the copy while this ability is resolving and still on the stack. Normally, you’re not allowed to cast spells or activate abilities at this time. Reversal of Fortune provides an exception.

12/1/2004
You don’t pay the spell’s mana cost. If the spell has X in its mana cost, X is 0. You do pay any additional costs for that spell. You can’t use any alternative costs.

12/1/2004
If the copied card is a split card, you may choose to cast either side of the split card but not both.

12/1/2004
You can’t cast the copy if an effect prevents you from casting instants or sorceries, or from casting that particular instant or sorcery. It doesn’t matter whether your opponent can cast the card at this time; the only thing that matters is whether you can cast it.

12/1/2004
You can’t cast the copy unless all of its targets, if any, can be chosen.

12/1/2004
If you don’t want to cast the copy, you can choose not to; the copy ceases to exist the next time state-based actions are checked.

12/1/2004
The spell is cast from your opponent’s hand, not yours, which can be important for some cards.

3/1/2005
The creation of the copy and then the casting of the copy are both optional.

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