Cheapest priced copy (Duel Decks: Speed vs. Cunning): $0.35 at Card Kingdom, near mint, their price list as of .
Flame-Kin Zealot 
Creature — Elemental Berserker · 2/2 · Uncommon · Ravnica: City of Guilds · #206
When this creature enters, creatures you control get +1/+1 and gain haste until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Speed vs. Cunning | 17 | Uncommon | $0.35 | — |
| Eternal Masters | 201 | Uncommon | $0.35 | $0.49 |
| The List | EMA-201 | Uncommon | $0.35 | — |
| Ravnica: City of Guilds | 206 | Uncommon | $0.35 | $1.49 |
One ruling from Wizards of the Coast
- 8 June 2016All creatures under your control when Flame-Kin Zealot’s triggered ability resolves are affected, including Flame-Kin Zealot itself. Ones that come under your control or become creatures later in the turn are not.