Myr Battlesphere

Condition: Near Mint
Color: Artifact
Card Text: When this creature enters, create four 1/1 colorless Myr artifact creature tokens. Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it’s attacking.
Rarity: R
Cost: 7
Pow/Tgh: 4/7
Card Type: Artifact Creature - Myr Construct
Artist: Franz Vohwinkel
Name: Myr Battlesphere
Finish: Regular
Card Number: 0322 
Set Name: Tarkir: Dragonstorm Commander