User blog comment:Vokster117/Key molds/@comment-24281205-20140111173700

First of all, what are you doing to get them? I find it quite easy,actually. Most of the time, I get them before I even try, but when I do go out to specically farm mold, I use a box made of meteorite and spikey ball traps set to a timer. Sometimes it takes a while, sometime you get what you want almost immediately.

You have to set up in the biome specific to the mold you want, I use a candle and battle potion to increase spawn rate. It's also a very good way to farm souls.