Myr Battlesphere [Commander 2013]Set: 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.

you win the game

Set: EX: Sandstorm Type: Water Rarity: Uncommon Retreat cost: 0

Set: Commander 2015 Type: Sorcery Rarity: Rare Cost: {4}{U}{U}{U} For each opponent

Set: Sun & Moon: Crimson Invasion Type: Darkness Rarity: Promo Retreat cost: Colorless

Set: World Championships 2007 Type: Trainer Rarity: Uncommon

Set: Rise of the Eldrazi Type: Sorcery Rarity: Rare Cost: {3}{B} Target player sacrifices a creature

Set: Sun & Moon: Base Set Type: Item Rarity: Promo

Set: Sword & Shield: Fusion Strike Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

Set: XY: Primal Clash Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

Set: EX: Delta Species Type: Colorless Rarity: Uncommon Retreat cost: Colorless

Set: Sword & Shield: Chilling Reign Type: Colorless Rarity: Ultra Rare Retreat cost: Colorless

Set: XY: Evolutions Type: Lightning Rarity: Holo Rare Retreat cost: Colorless