Galaxy Llama is an Uncommon Fortnite Spray.
The Galaxy Spray is part of a promotion where you can purchase a Samsung Phone Case and receive the spray and the following items:
- Phone Cover
- Lock Screen Wallpaper
- Home Screen Wallpaper
- Apps Theme
- Galaxy Llama spray
- 1,000 V-Bucks
It looks to be available in some countries but not all, here's an example of where you can purchase it from.