Cheapest priced copy (Conflux): $0.35 at Card Kingdom, near mint, their price list as of .
Worldly Counsel 
Instant · Common · Conflux · #39
Domain — Look at the top X cards of your library, where X is the number of basic land types among lands you control. Put one of those cards into your hand and the rest on the bottom of your library in any order.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $1.49 at Card Kingdom
3 rulings from Wizards of the Coast
- 4 October 2004You choose the order on the bottom of your library.
- 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.