Cheapest priced copy (Kaladesh): $0.35 at Card Kingdom, near mint, their price list as of .
Fairgrounds Warden 
Creature — Dwarf Soldier · 1/3 · Uncommon · Kaladesh · #13
When this creature enters, exile target creature an opponent controls until this creature leaves the battlefield.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.99 at Card Kingdom
5 rulings from Wizards of the Coast
- 20 September 2016In a multiplayer game, if Fairgrounds Warden's owner leaves the game, the exiled card will return to the battlefield. Because the one-shot effect that returns the card isn't an ability that goes on the stack, it won't cease to exist along with the leaving player's spells and abilities on the stack.
- 20 September 2016If a creature token is exiled this way, it will cease to exist and won't return to the battlefield.
- 20 September 2016The exiled card returns to the battlefield immediately after Fairgrounds Warden leaves the battlefield. Nothing happens between the two events, including state-based actions.
- 20 September 2016If Fairgrounds Warden leaves the battlefield before its triggered ability resolves, the target creature won't be exiled.
- 20 September 2016Auras attached to the exiled creature will be put into their owners' graveyards. Any Equipment will become unattached and remain on the battlefield. Any counters on the exiled permanent will cease to exist.