Mephistopheles

Archduke Mephistopheles, Lord of the Eighth, is widely seen as second only to Asmodeus in his power, ambition and cunning. Prince Marion's recent reentry to the cpourt, along with the power given to him by Asmodeus, has irritated Mephistopheles. home on Avernus, near Darkspine

He agreed to a meeting with Tripps Contracting at his dacha near Darkspine on Avernus, the 1st layer of Baator.

During that meeting, Tripps revealed the Marion-Vecna connection, and the possible purposes behind Marion's unexpected journey to Oerth.