Panic

Instant    (CMC:1)

Play only during combat before blockers are declared. Target creature cannot be assigned to block this turn. Draw a card at the beginning of the next turn.

5E • ENGreg Simanson

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Legal in: Ice Age Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

9/20/2013
If a turn has multiple combat phases, this spell can be cast during any of them as long as it's before the beginning of that phase's Declare Blockers Step.