Board Thread:General Discussion/@comment-24712247-20141009135553/@comment-3157150-20141010022645

Unless you are extremely lucky or use the AFK farming methods, you won't come across any of the molds any time soon. The drop rate is just too low. Even using the Pumpkin/Frost Moon as an enemy summoner, you're unlikely to get one with each summon. Remember that the drop rate is 0.04% (or $1/2500$ &mdash; which is a tiny number, actually 0.0004 when looking at a chance out of 1). I've set up several AFK farms for each different kind of mold, and I can say that they are the most reliable and efficient means to find key molds in the game at this current point.