Myr Battlesphere [Commander 2013] XY22 the ATK of your monster

the ATK of your monster becomes double its original ATK

Set: Starstrike Blast Card type: Effect Monster Rarity: Common Attack: 300 Defense: 600 If your opponent controls a face-up Synchro Monster(s) and you control no face-up Synchro Monsters

Set: Expedition: Base Set Type: Trainer Rarity: Common

monsters with a Level higher than the revealed monster cannot activate their effects

Set: Duel Devastator Card type: Continuous Spell Rarity: Ultra Rare During your Main Phase

Myr Battlesphere [Commander 2013] XY22 the ATK of your monsterSet: 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.