Martyr of Frost 
Creature — Human Wizard
, Reveal X blue cards from your hand, Sacrifice this creature: Counter target spell unless its controller pays 
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Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Human Wizard
, Reveal X blue cards from your hand, Sacrifice this creature: Counter target spell unless its controller pays .