Altar of Blood

I've watched this shrine for a long time. Countless people came in, and none of them succeeded in protecting their souls. Instead, they perished in agony, or succumbed to the evil. I believe the Cultists are like them. It might not have been their will to submit to Kzarka. Go to the Altar of Blood near the shrine, and use the spellbook that they carry.

Don't be afraid. It's something you'll have to know.

Evil exists everywhere. I'm certain that their goal is to resurrect Kzarka. But if you are right, it seems like their preparations are not yet complete. This is fortunate in a bleak situation like this, but there are still many people being victimized. There are stronger enemies inside the shrine. So you won't be able to stop them for now. When you feel that you have become truly strong, then come back at that time. The conquering of Serendia Shrine is a great task for the peace of all of Serendia.