Planescape: Across the Multiverse
Gerrzog the Glabrezu
A True Tanar'ri encountered by the duo on the Infinite Staircase. Banished to realms unknown.
Gerrzog found his way onto the Infinite Staircase by means unknown, and in Tanar’ri fashion, attempted to destroy as much of it as possible. The intervention of Symeon and Dirge to cut away the broken staircase he was nesting on has banished him to a unknown location.