I'm very near the end of TOB, but still have one "challenge" room locked (force-field still up) in the Abyssal Fortress. It is the southeast room, which I've read in walkthroughs should hold Cyric. I think that each room is opened after one of the "Five" are defeated, but I don't know who I need to defeat in order to open this room. I'm fairly sure I've taken out everyone I've run into so far, and I think I've explored every map thoroughly, but apparently I've missed someone or someplace.

Can anyone please help me with this?

If you've already defeated Sendai and Abaizgal, go to Amekathan and find a way into the monastery.

Thanks for the reply, Koskinator!

It was Sendai that I missed. I had cleared all Sendai maps, but didn't realize that I hadn't actually killed Sendai and that I needed to revisit at least one area to find and kill her (and she was pretty tough). Afterwards, Cyric was wimpy.

This is my first playthrough, by the way, and I'm very excited to be (I think) very close to finishing!

Moving on! :)