Myr Battlesphere 
Artifact Creature — Myr Construct
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.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Prints
Secret Lair Drop
EN · SLD · 2025-07-14
Tarkir: Dragonstorm Commander
EN · TDC · 2025-04-11
Modern Horizons 3 Commander
EN · M3C · 2024-06-14
March of the Machine Commander
EN · MOC · 2023-04-21
Phyrexia: All Will Be One Commander
EN · ONC · 2023-02-10
The Brothers' War Commander
EN · BRC · 2022-11-18
Commander 2021
EN · C21 · 2021-04-23
Double Masters
EN · 2XM · 2020-08-07
Commander 2018
EN · C18 · 2018-08-10
Commander Anthology Volume II
EN · CM2 · 2018-06-08
Duel Decks: Elves vs. Inventors
EN · DDU · 2018-04-06
Commander 2016
EN · C16 · 2016-11-11
Commander 2014
EN · C14 · 2014-11-07
Commander 2013
EN · C13 · 2013-11-01
Scars of Mirrodin
EN · SOM · 2010-10-01