Name:Rethink
ManaCost:2 U
Types:Instant
A:SP$ Counter | Cost$ 2 U | TargetType$ Spell | ValidTgts$ Card | UnlessCost$ X | UnlessPayer$ TargetedController | References$ X | SpellDescription$ Counter target spell unless its controller pays {X}, where X is its converted mana cost.
SVar:X:Targeted$CardManaCost
SVar:Picture:http://www.wizards.com/global/images/magic/general/rethink.jpg
Oracle:Counter target spell unless its controller pays {X}, where X is its converted mana cost.