You can get to the temple of void using a Succibi hair in the altar. Once you get to Void Camp, you will be greeted by Dennis who also has a quest for Clerics. Throughout the VoidSphere, I would recommend not stepping off of the carpet! At the end of VoidSphere you might come across the entrance of a tower. This is the beginning of a raid you may not even be ready for! Shadow Tower is for lvl 350+ and more info will come later.