The Cult of the Crystal Spider
Marxibis' father figure ... and captor.
Thoril had a life-long obsession with achieving great power. He came close to achieving this by making a pact with a Great Old One, but ultimately couldn’t pull the trigger. He died an impotent coward, but his daughter (of sorts) Marxibis would end up achieving the power he was so obsessed with—and afraid of.
Thoril was the younger brother of Darevar Stonesplitter.