Myr Battlesphere [Commander 2013] Human Wizard Whenever a permanent owned by

Whenever a permanent owned by another player is put into a graveyard from the battlefield

strongest of all

{T}: Counter target activated ability from an artifact source unless that ability's controller pays {W}

When Blood Operative enters the battlefield

Myr Battlesphere [Commander 2013] Human Wizard Whenever a permanent owned bySet: Commander 2013 Type: Artifact Creature Myr Construct Rarity: Rare Cost: {7} 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.