Cheapest priced copy (Tempest): $0.49 at Card Kingdom, near mint, their price list as of .
Magmasaur 
Creature — Elemental Dinosaur · 0/0 · Rare · Tempest · #188
This creature enters with five +1/+1 counters on it.
At the beginning of your upkeep, you may remove a +1/+1 counter from this creature. If you don't, sacrifice this creature and it deals damage equal to the number of +1/+1 counters on it to each creature without flying and each player.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tempest | 188 | Rare | $0.49 | — |