When Myr Battlesphere enters the battlefield, create four 1/1 colorless Myr artifact creature tokens. Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.
Near Mint - $600
Lightly Played - $400
Moderately Played - $400
Heavily Played - $300
Damaged - $300
Near Mint Spanish - $600
Lightly Played Spanish - $400
Moderately Played Spanish - $400
Heavily Played Spanish - $300
Damaged Spanish - $300
Foil Prices
Near Mint Foil - $19.700
Lightly Played Foil - $15.800
Moderately Played Foil - $13.800
Heavily Played Foil - $11.800
Damaged Foil - $9.900
Near Mint Foil Spanish - $19.700
Lightly Played Foil Spanish - $15.800
Moderately Played Foil Spanish - $13.800
Heavily Played Foil Spanish - $11.800
Damaged Foil Spanish - $9.900