(Sol B, SolB, Nagafen's Lair) (P.n.) Shortened name for the "Nagafen's Lair" dungeon. The name comes from the original name of the zone, Solusek B. The dungeon was renamed to Nagafen's Lair about 2 months after commercial release.

Nagafen's Lair (informally called Sol B) is a large set of caverns that lie deep in the Lavastorm Mountains. Buried deep inside these caves is the lair of the Fire Giants, who are the personal servants of the mighty dragon, Lord Nagafen. The caverns leading to the dragon are infested with all manner of bats and insects, as well as kobolds that have taken up residence in the entrance to them.