Long River Lurker
Creature — Frog Scout
Ward 
Other Frogs you control have ward .
When this creature enters, target creature you control can't be blocked this turn. Whenever that creature deals combat damage this turn, you may exile it. If you do, return it to the battlefield under its owner's control.
Valera Lutfullina
Bloomburrow (BLB)
• #57Rulings
If a token is exiled this way, it will cease to exist and won't return to the battlefield.
(wotc • 2024-07-26)
Once the exiled permanent returns, it's considered a new object with no relation to the object that it was. Auras attached to the exiled permanent will be put into their owners' graveyards. Equipment attached to the exiled permanent will become unattached and remain on the battlefield. Any counters on the exiled permanent will cease to exist.
(wotc • 2024-07-26)
Once a ward ability of another Frog has triggered, causing it to lose ward by removing Long River Lurker or changing its creature types won't affect that ability. The appropriate player will still have to pay {1} or have their spell or ability countered.
(wotc • 2024-07-26)
Rulings
If a token is exiled this way, it will cease to exist and won't return to the battlefield.
(wotc • 2024-07-26)
Once the exiled permanent returns, it's considered a new object with no relation to the object that it was. Auras attached to the exiled permanent will be put into their owners' graveyards. Equipment attached to the exiled permanent will become unattached and remain on the battlefield. Any counters on the exiled permanent will cease to exist.
(wotc • 2024-07-26)
Once a ward ability of another Frog has triggered, causing it to lose ward by removing Long River Lurker or changing its creature types won't affect that ability. The appropriate player will still have to pay {1} or have their spell or ability countered.
(wotc • 2024-07-26)