Battle with Agun is only the start.
Sam started the most time consuming hunt ever and in the middle of it all, he has to deal with the ambushes and the attacks lead by the remaining Elite ten of the Union sect.
For obvious reasons, he became their major target. It almost seemed like they changed their goal from the taking over Nagin to just killing Sam. At least, he became their priority over Nagin castle.
But Sam didn't have time to care for their reasons, he used all the moves in his arsenal to deal with them. Wherever he went, there are numerous people turning into corpses. For some reason, the Union sect's soldiers increased. They seemed to have a large scale recruitment. No one knows where they came from and how did they manage that.
Even the emperors couldn't find a reason, but there are addition three thousand troops in the Union sect and they comprised of many races.
Along with that there are flocks of beasts accompanying them.