Foundry Inspector
Artifact Creature — Construct
Artifact spells you cast cost 
less to cast.
"Delicate resonance detectors could scan the assembly lines for metallic impurities, loose bolts, and freak occurrences of sentience." —Tawnos, proposal for overseer prototype
3/2
Illustrated by
The Brothers' War Retro Artifacts#79zUncommonEnglishLegality
Rulings
Sep 20, 2016
If an artifact spell has 
in its mana cost, choose the value for X first, and then reduce the cost by . For example, an artifact that costs with X chosen as 4 costs to cast if you control Foundry Inspector.
Sep 20, 2016
Once a player has announced an artifact spell, no player may take actions to try to remove Foundry Inspector from the battlefield before that spell’s cost is locked in.