Logic Knot
Instant {X}{U}{U} (2)

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Counter target spell unless its controller pays {X}.

Illus. Glen Angus


Color Identity: U,Blue
Printings:
Future Sight (Common)

Foreign Names:

Formats:
Legal in Vintage
Legal in Penny
Legal in Pauper
Legal in Modern
Legal in Legacy
Legal in Duel
Legal in Commander
Rules Questions / Links:
Official Gatherer Page
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Crystal Keep Rulings Summaries