Bind the Interloper

Infernal Sorcery

(Variable-Level Ritual)

This ritual allows a character to force a demon summoned by another thaumaturge into servitude, allowing him to command the demon as if he summoned it himself. Some methods may include promising a bounty of souls to the infernal in payment, knowledge of the demon's True Name (which probably differs from its summoning name) or a sacrifice of a valuable object or commodity like the caster's blood.
System: The ritual's level varies depending on the potency of the entity being bound (see the table for Call Forth the Host), and the ritual requires 10 minutes per level to perform. The thaumaturge must know the demon's name and achieve more successes on the roll than the original summoner accumulated when calling the demon forth. Should the binding succeed, the demon serves the thaumaturge for the remainder of its servitude period, without beginning a new one.