Cheapest priced copy (Commander Masters): $1.29 at Card Kingdom, near mint, their price list as of .
Capricious Sliver 
Creature — Sliver · 3/3 · Rare · Commander Masters · #734
Sliver creatures you control have "Whenever this creature deals combat damage to a player, exile the top card of your library. You may play that card this turn."
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $1.29 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 734 | Rare | $1.29 | — |
| Commander Masters | 765 | Rare | $1.29 | $3.99 |
One ruling from Wizards of the Coast
- 28 July 2023You must pay all costs and follow all normal timing rules for cards played this way. For example, you may only play a land from exile this way during your main phase while the stack is empty, and only if you haven't played a land yet this turn.