Complex sentence: Thus, Levistus has no allies among them and tries to raise a cult on the Prime Material Plane to gain more power, the largest of which is the iceberg-based floating city of Icerazor.
Split into simpler sentences: Thus, Levistus has no allies among them and tries to raise a cult on the Prime Material Plane to gain more power. His largest cult is the iceberg-based floating city of Icerazor.