One Life is a collaborative modded Minecraft series by 12 YouTubers. The series is played on a SMP server in Ultra Hardcore mode. Their goal is to kill the ender dragon together. The One Life server is created and hosted by Yammy and she initially invited 11 YouTubers, including Kim and Caff, onto the server. Should any YouTuber die in the game, he or she will be kicked off the server and a new YouTuber will replace him or her.