Cheapest priced copy (Duel Decks: Phyrexia vs. the Coalition): $0.35 at Card Kingdom, near mint, their price list as of .
Tribal Flames 
Sorcery · Special · Time Spiral Timeshifted · #70
Domain — Tribal Flames deals X damage to any target, where X is the number of basic land types among lands you control.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
5 printings · $0.35 to $13.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Phyrexia vs. the Coalition | 51 | Common | $0.35 | — |
| Invasion | 176 | Common | $0.35 | $13.99 |
| Modern Masters 2015 | 132 | Common | $0.35 | $0.49 |
| Modern Masters | 138 | Uncommon | $0.35 | $1.49 |
| Time Spiral Timeshifted | 70 | Special | $0.49 | $8.99Out of stock |
2 rulings from Wizards of the Coast
- 18 June 2021Domain abilities count the number of basic land types among lands you control, not how many lands you control or how many of any type.
- 18 June 2021The basic land types are Plains, Island, Swamp, Mountain, and Forest. Land types other than basic land types (such as Desert) don’t contribute to domain abilities.