Myr Battlesphere [Double Masters] on sale "Our border lands fall under

"Our border lands fall under the grip of Heidar's second winter

add that much mana in any combination of {R} and/or {G}

Tap all creatures

you may discard all the cards in your hand

Myr Battlesphere [Double Masters] on sale "Our border lands fall underSet: Double Masters 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.