Koschei.
An old, immortal wizard who lived within an ancient castle, now the rebuilt castle of Nidar, with unimaginable powers. Again, we had to go to the spirit world. Now, though, we had a much different task as our physical strength and powers would do nothing to help us.
First, however, we visited Nidar at the mansion in question to find out more details.
A day before, after Ihar had scolded him about building in the location that was thought to Koschei's home, he replied,
"Ah, come now Ihar! Do not be such an old crank! I knew where my new mansion was being built! Purposely! You see, Koschei can be swayed to our side, and used! Yes, used to help keep those pesky villains from bothering us. We just need to send Druk to deal with him!"
This is what Nidar told us. Reckless.
I couldn't go. Nidar had overlooked that. He also underestimated Koschei's power. This wasn't the normal spirit world creature we would be dealing with.