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 Foil - £1.60
Lightly Played Foil - £1.40
Moderately Played Foil - £1.20
Heavily Played Foil - £0.80
Damaged Foil - £0.50
Near Mint Foil Non English - £1.60
Lightly Played Foil Non English - £1.40
Moderately Played Foil Non English - £1.20
Heavily Played Foil Non English - £0.80
Damaged Foil Non English - £0.50