Toril Thirteen

A Toril thirteen was a set of thirteen warlocks who descended from the original thirteen tiefling warlocks who made pacts with Asmodeus. Some devils collected sets of warlocks, and a Toril thirteen was considered one of the most difficult collections to acquire because one of the warlocks named Bryseis Kakistos had very few living heirs.

Original Thirteen
The names of some of the thirteen were unknown. In addition to Kakistos, the known original thirteen were:
 * Phrenike
 * Lahriman Jarl
 * Nicodemus
 * Caisys the Vicelord
 * Caldura Elyria
 * Titus Greybeard
 * Margarites
 * Pradir Ril
 * Zeal Harper

Known Complete Sets

 * The cambion Lorcan had a full set of thirteen warlocks by 1478 DR. However, during his imprisonment in Malbolge several of his Thirteen were either stolen by other devils or slain outright.