Myr Battlesphere
From Commander 2021 set
Myr Battlesphere
Artifact Creature — Myr Construct
4/7
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.
