Cheapest priced copy (Dominaria United): $0.35 at Card Kingdom, near mint, their price list as of .
Radha, Coalition Warlord 
Legendary Creature — Elf Warrior · 3/3 · Uncommon · Dominaria United · #211
Domain — Whenever Radha becomes tapped, another target creature you control gets +X/+X until end of turn, where X is the number of basic land types among lands you control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 211 | Uncommon | $0.35 | $0.49 |
| Dominaria United | 310 | Uncommon | $0.35 | $0.49 |
| Dominaria United | 351 | Uncommon | — | $0.35 |
| Multiverse Legends | 55 | Uncommon | $0.35 | $0.49 |
| Multiverse Legends | 120 | Uncommon | — | — |
| Multiverse Legends | 185 | Uncommon | — | $0.49 |
| Multiverse Legends | 185z | Uncommon | — | — |
2 rulings from Wizards of the Coast
- 9 September 2022The 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.
- 9 September 2022Domain abilities count the number of basic land types among lands you control, not how many lands you control or how many of any type.