Isolation Cell 
Artifact
Whenever an opponent casts a creature spell, that player loses 2 life unless they pay 
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Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Artifact
Whenever an opponent casts a creature spell, that player loses 2 life unless they pay .