Cheapest priced copy (Aether Revolt): $0.35 at Card Kingdom, near mint, their price list as of .
Weldfast Engineer 
Creature — Human Artificer · 3/3 · Uncommon · Aether Revolt · #139
At the beginning of combat on your turn, target artifact creature you control gets +2/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aether Revolt | 139 | Uncommon | $0.35 | $0.49 |