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Spell Rupture
Instant
Counter target spell unless its controller pays X generic mana , where X is the greatest power among creatures you control.
"Like water, mana will drain from an inferior vessel." —Jalan Tosk, Simic forcemage
Rulings (1)
The value of X is the greatest power among creatures you control when Spell Rupture resolves. If you control no creatures at that time, X will be 0. The target spell’s controller can choose to pay 0 generic mana (simply by indicating they wish to do so). That player can also choose to not pay 0 generic mana and the spell will be countered.
Jan 24, 2013
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