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From $3.25
'Counter target instant or sorcery spell unless its controller pays {1}. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose...
From $62.00
'({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.
From $3.50
'Spree (Choose one or more additional costs.) + {1}{U} — Counter target spell. + {3} — Create a token that's a copy of target artifact or creature you control. +...
From $5.00
'Counter target instant or sorcery spell unless its controller pays {1}. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose...
From $1.25
'Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may play it without paying its mana cost for...
From $2.50
'Baron Von Count enters with a doom counter on "5." Whenever you cast a spell with the indicated numeral in its mana cost, text box, power, or toughness, move the...
From $26.75
'Flash
Flying
When this creature enters, counter target spell with mana value X or less, where X is the number of Faeries you control.
From $0.75
'Counter target spell unless its controller discards their hand. Transmute {1}{U}{B} ({1}{U}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal...
From $5.50
'Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)