Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
"It is technically an ooze, but its lifespan measures only seconds. In that short time, its appetite for magic is extraordinary."
—Simic research notes
Near Mint - $700
Lightly Played - $600
Moderately Played - $500
Heavily Played - $500
Damaged - $400
Near Mint Spanish - $700
Lightly Played Spanish - $600
Moderately Played Spanish - $500
Heavily Played Spanish - $500
Damaged Spanish - $400
Foil Prices
Near Mint Foil - $19.600
Lightly Played Foil - $15.700
Moderately Played Foil - $13.700
Heavily Played Foil - $11.800
Damaged Foil - $9.800
Near Mint Foil Spanish - $19.600
Lightly Played Foil Spanish - $15.700
Moderately Played Foil Spanish - $13.700
Heavily Played Foil Spanish - $11.800
Damaged Foil Spanish - $9.800