Cheapest priced copy (Double Masters 2022): $0.49 at Card Kingdom, near mint, their price list as of .
Leonin Arbiter 
Creature — Cat Cleric · 2/2 · Rare · Scars of Mirrodin · #14
Players can't search libraries. Any player may pay {2} for that player to ignore this effect until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $0.49 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 16 | Rare | $0.49 | $0.99 |
| Double Masters 2022 | 418 | Rare | — | — |
| Commander 2017 | 64 | Rare | $0.69 | — |
| The List | C17-64 | Rare | $0.59 | — |
| Scars of Mirrodin | 14 | Rare | $0.79 | $6.99 |
10 rulings from Wizards of the Coast
- 1 January 2011If a player pays {2}, that enables only them to ignore Leonin Arbiter's effect that turn. Each other player is still affected by it.
- 1 January 2011Paying {2} to ignore Leonin Arbiter's effect is a special action. Any player may take this special action any time they have priority. It doesn't use the stack and can't be responded to.
- 1 January 2011Paying {2} doesn't let a player pick up a library and search it — it just allows them to ignore Leonin Arbiter's effect that turn. That player can search a library only if another spell or ability instructs them to do so.
- 1 January 2011Since players who haven't paid {2} can't search, they won't be able to find any cards in a library. The effect applies to all players and all libraries. If a spell or ability's effect has other parts that don't depend on searching for or finding cards, they will still work normally.
- 1 January 2011If an effect says "You may search your library . . . If you do, shuffle your library" or "You may search your library . . . then shuffle your library," you can't choose to search, so you won't shuffle.
- 1 January 2011If an effect says "Search your library . . . then shuffle your library," you shuffle you libraries even though you can't search.
- 1 January 2011Effects that instruct you to reveal or look at cards from the top of you library will still work. Only effects that use the word "search" are affected.
- 1 January 2011Once a player has paid {2}, they may search libraries that turn as many times as they are instructed to do so.
- 1 January 2011If there are multiple Leonin Arbiters on the battlefield, a player must pay {2} for each one before being able to search libraries that turn.
- 1 January 2011A player who has paid {2} may search any library when instructed to do so that turn, not just their own library.