Spell Rupture
{1}{U}
Instant
Oracle Text
Counter target spell unless its controller pays {X}, where X is the greatest power among creatures you control.
Watch Out
Static ability — always active, can't be responded toRules Note
This card has a static ability that applies continuously as long as it's on the battlefield. There's no trigger or activation — the effect just exists. Removing the permanent is the only way to stop it.