Oracle

Instant 

Surge XR (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Fall of the Titans deals X damage to each of up to two targets.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

1/22/2016
Fall of the Titan’s converted mana cost is based on its mana cost of XXR, even if you’re casting it for its surge cost. For example, if you cast Fall of the Titans for its surge cost and choose 4 for X, its converted mana cost will be 9.

1/22/2016
For some cards, surge represents only an alternative cost, a discount that applies if you or a teammate has cast another spell this turn. Other cards, like Reckless Bushwhacker, have additional abilities or effects if you paid the surge cost to cast the spell.

1/22/2016
The other spell that you or a teammate cast can be one that’s resolved, one that was countered, or (for instants with surge) one that’s still on the stack.

1/22/2016
If an instant or sorcery spell cast for its surge cost is copied, the copy is also considered to have had its surge cost paid.

1/22/2016
Casting a spell for its surge cost doesn’t change its mana cost or its converted mana cost.

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