Counter target spell unless its controller pays X. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
The first spell stuttered and broke. Its pieces reached Teferi out of rhythm, meaningless.
Illus. Tommy Arnold
MYTHICSPOILER.COM THE CYCLICAL MTG SPOILER
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KHANS OF TARKIR 
COMMANDER 2014
FTV: ANNIHILATION 
SPEED vs CUNNING 
MAGIC 2015 
CONSPIRACY 
MORE SETS
