I'm having a slight problem with the YogBox mod if anyone knows alot about it It isn't anything about loading or something like that. There is one thing in there called the "Obsidian Altar" that I mined from a dungeon (also a mod, don't know name) and every time I place it, and turn around, FREAKISHLY DEMONIC NOISES COME FROM IT! It also emits a small amount of light, and looks like obsidian blocks wiith a large dent in the side. If it is anything to do with Thaumcraft, tell me, I cannot find it anywhere! Also, give me any information you have about how to catch those pesky Vis Crystals!