The High Thaumaturge became the current leader of the Spider-Cult. The Spider-Cult had dwindled to a mere handful of individuals during the Fallen Lords and Soulblighter's era. The High Thaumaturge held many cultists under his sway and could control many spiders both human sized and giant sized. Among the Cultists were those who did not follow the Deceiver (Warlocks) and Priests.
The High Thaumaturge was fixated on one goal and that was to become a living God. He felt that through the powers of Spider Goddess, he could accomplish this. Thus he set up the new spider cult and encouraged many to follow him.