Cheapest priced copy (Commander 2020): $0.49 at Card Kingdom, near mint, their price list as of .
Predator Ooze 
Creature — Ooze · 1/1 · Rare · Commander 2020 · #185
Indestructible (Damage and effects that say "destroy" don't destroy this creature.)
Whenever this creature attacks, put a +1/+1 counter on it.
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.49 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2020 | 185 | Rare | $0.49 | — |
| Dark Ascension | 124 | Rare | $0.79 | $4.49 |
| Foundations | 642 | Rare | $0.49 | — |
One ruling from Wizards of the Coast
- 22 January 2011Each time a creature dies, check whether Predator Ooze had dealt any damage to it at any time during that turn. If so, Predator Ooze's ability will trigger. It doesn't matter who controlled the creature or whose graveyard it was put into.