I think the guardian is very much awake and caused all this after the thaumaturge's/necromancer's went too far. Thats why they died too. Since most of the people were horrified to what they were doing to the bodies/living people,questioning the morale of their actions. People before were there to gain more power. Something went wrong and the guardian awoke. Sir might be one of his "champions". Also it could be that the Guardian itself woke up all the undead. The hospital,was it on level 2, describes that the patients had lacerations and bite wounds from a huge beast. Description fits and this also means that both sides were alive at same time. There is a mention of a war too,that we(dunno what side the writer means) won. Eventually though everyone has died and undead risen,could be though that there is some necromancer still alive deeper who raised those. Then again,someone outside knows the place and keeps sending people in and the reason isn't clearing the undead.
So,they woke up guardian,it sent forth its own champions,necros/thauma's fought back and eventually lost. People outside don't seem to know what happened inside,so they keep on sending people as agreed.
Now that i unlocked the proctor,it very much confirms that there are people being kidnapped from 2 villages and the king sent his proctor(the one you kill) to check it out. Well,that proctor died too and someone turned him to a undead too,perhaps the necromancer who resides deeper?
Really love how they don't just hand out the facts of the story
