Ugh, that site doesn't use the css background-repeat property, and thus looks like garbage at any reasonable resolution.
The best rumors for anything are completely unverifiable without knowledge of the inner workings of the game (AI, item drops, etc). For example, saying that it needs a rare item that drops randomly from a specific enemy 0.001% of the time, nobody has the patience to verify that in-game. Of course, with our tools, we can verify anything.