Cheapest priced copy (Dominaria United): $0.35 at Card Kingdom, near mint, their price list as of .
Slimefoot's Survey 
Sorcery · Uncommon · Dominaria United · #178
Domain — Search your library for up to two land cards that each have a basic land type, put them onto the battlefield tapped, then shuffle. Look at the top X cards of your library, where X is the number of basic land types among lands you control. Put up to one of them on top of your library and the rest on the bottom of your library in a random order.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 178 | Uncommon | $0.35 | $0.49 |
5 rulings from Wizards of the Coast
- 9 September 2022When searching your library this way, you may find cards that are not basic lands as long as they have one or more of the basic land types. The basic land types are Plains, Island, Swamp, Mountain, and Forest.
- 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 2022The value of X is determined after you put the lands you searched for onto the battlefield.
- 9 September 2022You may search for two cards with the same basic land type or different basic land types.
- 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.