Cheapest priced copy (Murders at Karlov Manor Commander): $9.49 at Card Kingdom, near mint, their price list as of .
Krobus 
Academy Manufactor
Artifact Creature — Assembly-Worker · 1/3 · Rare · Secret Lair Drop · #7188
If you would create a Clue, Food, or Treasure token, instead create one of each.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
11 printings · $9.49 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow Commander | 264 | Rare | $10.99 | — |
| Modern Horizons 2 | 219 | Rare | $10.99 | $14.99 |
| Modern Horizons 2 | 469 | Rare | $13.99 | $15.99 |
| Murders at Karlov Manor Commander | 221 | Rare | $9.49 | — |
| March of the Machine Commander | 346 | Rare | $9.99 | — |
| Outlaws of Thunder Junction Commander | 251 | Rare | $9.49 | — |
| The List | MH2-219 | Rare | $10.99 | — |
| Modern Horizons 2 Promos | 219s | Rare | — | $16.99 |
| Secret Lair Drop | 2195 | Rare | $19.99 | $19.99 |
| Secret Lair Drop | 7094 | Rare | $13.99 | $16.99 |
| Secret Lair Drop (Krobus) | 7188 | Rare | $10.99 | $12.99 |
4 rulings from Wizards of the Coast
- 18 June 2021Creating a Clue token this way isn't the same thing as investigating. Notably, an ability that triggers whenever you investigate won't trigger because you created a Clue token due to this replacement effect. If the original token creation was because you investigated once, those abilities will still each trigger once, no matter how many Clue tokens you end up creating.
- 18 June 2021If you control two Academy Manufactors and would create some number of Clue, Food, or Treasure tokens, you will instead create three times that many Clue tokens, three times that many Food tokens, and three times that many Treasure tokens.
- 18 June 2021If you control one Academy Manufactor and would create some number of Clue, Food, or Treasure tokens, you will instead create that many Clue tokens, that many Food tokens, and that many Treasure tokens.
- 18 June 2021If you control eighteen Academy Manufactors (I don't know, you figure it out) and would create some number of Clue, Food, or Treasure tokens, you will instead create 129,140,163 times that many Clue tokens, 129,140,163 times that many Food tokens, and 129,140,163 times that many Treasure tokens.