Cheapest priced copy (Gatecrash): $0.49 at Card Kingdom, near mint, their price list as of .
Ooze Flux 
Enchantment · Rare · Gatecrash · #128
{1}{G}, Remove one or more +1/+1 counters from among creatures you control: Create an X/X green Ooze creature token, where X is the number of +1/+1 counters removed this way.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Gatecrash | 128 | Rare | $0.49 | $0.79 |