Arvinox, the Mind Flail isn't a creature unless you control three or more permanents you don't own. At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.
Near Mint - $11.300
Lightly Played - $9.100
Moderately Played - $7.900
Heavily Played - $6.800
Damaged - $5.700
Near Mint Spanish - $11.300
Lightly Played Spanish - $9.100
Moderately Played Spanish - $7.900
Heavily Played Spanish - $6.800
Damaged Spanish - $5.700
Foil Prices
Near Mint Foil - $14.700
Lightly Played Foil - $11.800
Moderately Played Foil - $10.300
Heavily Played Foil - $8.900
Damaged Foil - $7.400
Near Mint Foil Spanish - $14.700
Lightly Played Foil Spanish - $11.800
Moderately Played Foil Spanish - $10.300
Heavily Played Foil Spanish - $8.900
Damaged Foil Spanish - $7.400