I kinda messed up, I opened the portal at the end but didnt know it was a 1 hour thing. But huge veilstones inside. one run = 22k. So I am running it a bunch and will have to work hard to get back to the portal opening and let a_skeleton_03 have a shot.
As for the gold chest I found i see it more if I don't have any portal runes to use. But may just be coincidence. They still show though, got two today.
Also found a bug that basically doubles and triples your health. I don't know the exact time to do it but if you click the home button on your phone while loading battles it screws up the hit points. I haven't perfected when or if its entering or existing a battle. But I noticed it when I would exit the game multiple times a run while at work. Its not perfect but if you do it enough it will work, sometimes lol. However if you exit out of the game long enough for it to reload, it resets the HPs. Must be a cache thing.