Your search for "Master Transmuter 7" revealed the following:
Master Transmuter (BRC) from The Brothers' War Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your hand...
Master Transmuter (Foil) (2XM) from Double Masters, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your hand onto...
Master Transmuter (CON) from Conflux, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your hand into play.
Master Transmuter (Foil) (CON) from Conflux, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your hand into play....
Master Transmuter (2XM) from Double Masters, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your hand onto the...
Master Transmuter (ARC) from Archenemy, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your hand onto the battlefield....
Master Transmuter - CON Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Chippy Card Text:U, T, Return an artifact you control to its owner's hand: You may put an artifact card from your...