Cheapest priced copy (Planechase 2012): $2.79 at Card Kingdom, near mint, their price list as of .
Thromok the Insatiable 
Legendary Creature — Hellion · 0/0 · Mythic · Planechase Anthology · #106
Devour X, where X is the number of creatures devoured this way (As this creature enters, you may sacrifice any number of creatures. It enters with X +1/+1 counters on it for each of those creatures.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Planechase 2012 | 106 | Mythic | $2.79 | — |
| Planechase Anthology | 106 | Mythic | $2.79 | — |
One ruling from Wizards of the Coast
- 1 June 2012For example, if Thromok devours one creature, it will enter with one +1/+1 counter on it. If it devours two creatures, it will enter with two +1/+1 counters for each of them, for a total of four +1/+1 counters. Devouring three creatures will produce nine +1/+1 counters, and so on.