Cheapest priced copy (The Brothers' War): $0.35 at Card Kingdom, near mint, their price list as of .
Tower Worker 
Artifact Creature — Assembly-Worker · 1/3 · Common · The Brothers' War · #255
Reach
{T}: Add {C}. If you control creatures named Mine Worker and Power Plant Worker, add {C}{C}{C} instead.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War | 255 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 14 October 2022You will add {C}{C}{C} instead of {C} if you control at least one creature named Mine Worker and at least one creature named Power Plant Worker.