Quote (AngryLink @ Jul 3 2015 04:01pm)
Apparently transmuting puzzle rings and bovine bardiches will open portals to the vault and whimsyshire respectively, if anyone wanted to do that I guess.
Just a correction, from what I understand the bovine bardiches will not open a portal to whimsyshire, but rather the "Not The Cow Level" which they had a while ago for April Fool's Day. The area looks like Fields of Misery, with tons of cows and TONS of chest/gold. Useful for gold farming.