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 - $1.00
Near Mint Non English - $1.00
Lightly Played - $0.95
Lightly Played Non English - $0.95
Moderately Played - $0.85
Moderately Played Non English - $0.85
Heavily Played - $0.75
Heavily Played Non English - $0.75
Damaged - $0.60
Damaged Non English - $0.60