You choose the value for X as the last ability resolves. You can't choose a value for X that's greater than the number of untapped Myr you control.
Myr Battlesphere
As the last ability resolves, you can tap untapped Myr you control even if Myr Battlesphere is no longer on the battlefield by then. If that has happened, Myr Battlesphere won't be able to get the +X/+0 bonus, but it will still deal X damage to the appropriate player or planeswalker.
You can tap any untapped Myr you control as the last ability resolves, not just the Myr tokens you created with the first ability. This includes Myr that haven't been under your control since your most recent turn began.
Last observed on Scryfall 2 months ago at $0.87. Over the trailing 90 days the price moved between $0.86 and $0.95 across 57 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from SLD — the lineup includes Borderless alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #2097 of *Secret Lair Drop*, the set that shipped alongside the July 2025 Secret Lair Drop release.
Card type: Artifact Creature — Myr Construct, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {7} (7 converted).
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #872 in Commander, putting it in the common-include tier of the format's playable pool.
Illustrated by Sylvain Sarrailh. Rarix catalogs 22 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Sylvain Sarrailh
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.





























