Ok....for the quest Containing the Stone, you need to make Empowered censor of Containment and Censer of containment. I went harvesting, and got lots of rares and tons of harvests from the dark and veined ores, but not even one Arcannium. We finally gave up. It cannot be that rare, and if it is, it seems that the drop rate needs to be upped some. They are going for unbelievable prices on the broker because of it being way to rare. It is very difficult to complete a quest that requires just 2 items that takes of hours of time harvesting to not find even one. Anyone else having this same problem? I never have problems getting any other rares....also I do use my harvesting helper items too.