The cards in your hand are exiled for the rest of the game; they aren't shuffled back into your library if you take another mulligan. Cards exiled are always face up unless the effect that exiled them says they aren't. Be sure to return those cards to your deck for your next game.
You can use Serum Powder's second ability only while it's in your hand. If this card is in your hand, you can choose either to mulligan or to use Serum Powder's ability. Using the ability doesn't prevent you from taking further mulligans, and taking a mulligan doesn't prevent you from using a Serum Powder's ability if you happen to draw one in your new hand.
Last observed on Scryfall 6 days ago at $25.66, up from $23.20 thirty days ago. Over the trailing 90 days the price moved between $0.23 and $25.66 across 50 observations — a moderately swinging band. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 3 catalogued treatments from DST — the lineup includes Foil and Nonfoil 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 #138 of *Darksteel*, the set that shipped alongside the February 2004 Darksteel release.
Card type: Artifact, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {3} (3 converted).
Legal in Modern, Legacy, Vintage, and Commander.
EDHrec ranks this card #16,273 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Matt Thompson. Rarix catalogs 83 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Matt Thompson
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
