I was really bummed out to see that the final store seems to be contingent on finishing the vault. I was in an execellent position to finish my 1st challenge run and after ruining my last attempt by dying in the vault, i thought that maybe I could just skip it and then after defeating the king I saw that there was no store :(. Went back to the vault saw the mesagae about the store. :(. Went in the vault. Was super careful. Still died.