Cheapest priced copy (March of the Machine): $0.35 at Card Kingdom, near mint, their price list as of .
Furnace Gremlin 
Creature — Phyrexian Gremlin · 1/2 · Uncommon · March of the Machine · #139
{1}{R}: This creature gets +1/+0 until end of turn.
When this creature dies, incubate X, where X is its power. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 139 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 14 April 2023Use Furnace Gremlin's power from when it was last on the battlefield to determine the value of X.