Myr Battlesphere [March of the Machine Commander] March of the Machine Commander Prerelease Promos put X +1/+1 counters on

put X +1/+1 counters on it

You have no maximum hand size for as long as you control The Great Synthesis

A graveyard for conquerors and conquered alike

{3}{W}{W}: Creatures you control get +1/+1 and gain vigilance until end of turn

Then target opponent may have you draw a card

Myr Battlesphere [March of the Machine Commander] March of the Machine Commander Prerelease Promos put X +1/+1 counters onSet: March of the Machine Commander 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.