This is actually the final step for xylar. The box of raisins was what you needed to kill xylar, but what you don't know is you had to have gone through a destiny paradox to obtain raisins before today. The only reason the raisins are available today is that this is the exact day that had to have happened in order for you to kill xylar. After this week xylar will no longer exist. Therefore, never have existed in the first place because of the raisins. This paradox can be quite confusing seeing as you really did kill xylar yet xylar never existed. A box of raisins seems to be a simple box of raisins if you want it to be. Only the paradox travelers will know the fate of obtaining a box of raisins. Xylar was no easy task yet never a task at all.