Cheapest priced copy (Jumpstart 2022): $0.59 at Card Kingdom, near mint, out of stock, their price list as of .
Wildfire Elemental 
Creature — Elemental · 3/3 · Common · Core Set 2020 · #297
Whenever an opponent is dealt noncombat damage, creatures you control get +1/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.59 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart 2022 | 624 | Common | $0.59Out of stock | — |
| Foundations Jumpstart | 616 | Common | $0.59Out of stock | — |
| Core Set 2020 | 297 | Common | $0.69Out of stock | — |
4 rulings from Wizards of the Coast
- 12 July 2019Wildfire Elemental's triggered ability affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won't get +1/+0.
- 12 July 2019The last ability of Wildfire Elemental triggers once for each event in which an opponent is dealt noncombat damage, regardless of how much damage that player is dealt.
- 12 July 2019Combat damage is the damage that's dealt automatically by attacking and blocking creatures. Any other damage is noncombat damage, even if it's dealt during a combat phase by an attacking or blocking creature.
- 12 July 2019In a multiplayer game, if a source deals damage to multiple opponents at the same time, the last ability of Wildfire Elemental will trigger that many times.