Myr Battlesphere

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.
"I'm the Trash Man!"