Source: Blood of Fiends, pg(s). 13
Erat the Constant is a mercenary associated with the Blood Lords of Geb and is a powerful sorcerer. While he works most often for the Blood Lords, he is willing to take commissions for other interested parties as well. Using necromancy to create loyal minions, Erat is renowned for releasing his newly created undead minions to wreak havoc once he is done using them for his current mission.