Cosmic Chest

Cosmic Chests are a special type of Chest in Fortnite: Battle Royale introduced in Chapter 2: Season 7. They only appear in modes with one than one squad member (Such as Duos or Squads), including Arena.

Functionality
Cosmic Chests consistently spawn in a random location around squad-mates' areas. There’s a separate chest for every squad which is invisible for other players.

The chest will ping itself to all squad members and an urgent quest will appear, similar to a bounty. The squad will then have 4 minutes to approach the chest, which will disappear otherwise.

When the whole squad approaches the chest, they will have to take turns hitting the weak spots on the chest to open it. Once this is complete, chest will repel players briefly, and open, giving up to three different rewards to the player, and also dropping loot.

Loot
Cosmic Chests will drop at least 2 of the following weapons: Cosmic Chests will also directly deposit Bars, XP or Ammo into the player's inventory, especially when they have opened several chests during the week.

Chapter 2: Season 7

 * Update v17.00: Added Cosmic Chests.
 * Only 15 Alien Artifacts can be obtained from Cosmic Chest per week. They can be collected again every Tuesday 4:00PM.

Chapter 2: Season 8

 * Update v18.00: Cosmic Chests spawn less frequently, and later into the game.
 * They will also give the player Rainbow Inks when opened.

Trivia

 * Music reminiscent of the OG (Classic) Music plays when opening.
 * Cosmic Chests appear to contain a brown colored Rare Chest inside them.