Levistus is the Lord of the sixth layer of the nine hells – Stygia. They were imprisoned in a remote Stygian iceberg by Asmodeus for scheming against him, kept alive for their strategic skill and limitless genius.
The two devils routinely war against one another by proxy – while also committing forces to the endless blood wars.
Levistus’ skills at scheming and espionage are matched only by their jailer’s, but they must rely on agents in the prime material plane who have dedicated their souls to them in order to execute their plans.
Although Asmodeus recognizes Levistus’ worth, the two devils are engaged in an endless dance of unfathomable layers of deceit, alliances, and treachery. In the end a balance is typically maintained, one that solidifies the status quo in the nine hells, and serves to strengthen the Devil’s forces in the Blood War.