During his exploration, he stumbled upon a sealed chamber and an ancient plague ghast . He captured it but was not able to control it fully before it infected one of Laogzod, the Troglodyte chieftain's mates.
Thozmolim fled with his ghasts to study them in peace but was hunted down and captured by Laogzod. Without his hammer, the Necrolyte Maul, his minions became feral and now stalk the endless passages of the World Cavern.
His skill at telepathy allowed him to contact Illiaph to beg for aid and was rescued just as Laogzod attempted to sacrifice him for some profane purpose.
He was rescued and guided Blackwell's crew out of the deep mountains. He is very interested in the parties activities and may follow them out of sincere concern, or maybe fear of the ghast plague, now free in the deep.