Talk:Cake/@comment-90.253.29.31-20170917143913/@comment-10507735-20170917145257

Lucky you. There's a good chance you'll be keeping that until the end of the game.

They spawn in Springboards when you run a mutant into it - but rarely. This is "new" for v1.4000+ and could easily have been coded for v1.3003. See also Artifact Spawns.