Another day, another XP farming method is discovered in The First Descendant. This time, we have a cave where, if you position yourself just right, you don't even have to fire a weapon to farm XP.
Level 1-40 in 19 minutes! New Best XP Farm // The First Descendants Guide!
This is how the Bunny Cave farming method works in The First Descendant.
The Bunny Cave is actually just a Void Fragment mission in The First Descendanant, located in Fortress, Fallen Ark. It takes place in a cave and you need an Electric Descendant (Sharen, Bunny, or Ultimate Bunny) to activate it. It's also a good idea to do this in a Private game, since a lot of other players are doing it at the moment.
This method allows you to increase your Descendant's XP and Weapon Proficiency. However, the Bunny Cave is not a great method for farming Gold or Kuiper shards, unlike the Valby farming method.