|Set:||Duel Decks: Elves vs. Inventors|
|Type:||Artifact Creature — Myr Construct|
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.
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