Your search for "Bastion Inventor 30" revealed the following:
Bastion Inventor - AER Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Tony Foti Card Text:Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities...
Bastion Inventor (AER) from Aether Revolt, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Tony Foti Card Text:Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for 1.)Hexproof...
Bastion Inventor (Foil) (AER) from Aether Revolt, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Tony Foti Card Text:Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for...