Cheapest priced copy (Time Spiral): $0.35 at Card Kingdom, near mint, their price list as of .
Firemaw Kavu 
Creature — Kavu · 4/2 · Uncommon · Time Spiral · #153
Echo {5}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, it deals 2 damage to target creature.
When this creature leaves the battlefield, it deals 4 damage to target creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Time Spiral | 153 | Uncommon | $0.35 | $0.49 |
| Time Spiral Remastered | 163 | Uncommon | $0.35 | $0.49 |