Cheapest priced copy (Eventide): $0.35 at Card Kingdom, near mint, their price list as of .
Canker Abomination 
Creature — Treefolk Horror · 6/6 · Uncommon · Eventide · #115
As this creature enters, choose an opponent. This creature enters with a -1/-1 counter on it for each creature that player controls.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eventide | 115 | Uncommon | $0.35 | $0.49 |
| Ultimate Masters | 212 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 7 December 2018You choose an opponent while Canker Abomination is entering the battlefield. No player may take actions between the time you choose the opponent and the time Canker Abomination gets -1/-1 counters.