When this creature enters, create four 1/1 colorless Myr artifact creature tokens.
Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.
![Myr Battlesphere [Foundations Commander]](http://www.dungeonsandjavas.com/cdn/shop/files/0d2658a9-e815-5d39-ab8d-707d30520f09.png?v=1790196009&width=1445)
