Thel-Kaaden

You know that Thel-Kaaden is a powerful and dangerous creature known as a Rakshasa, which are the reincarnation of fallen Devas.

You also know that he wields a sword called The Longsword of the Blacksoul that allows him to reap the souls of whoever it hits, making it an extremely powerful weapon. You also know that he is the Architect of a thing known as "The Mass Geas" which has somthing to do with mind control.

You have only seen him a few times, once when he nearly killed you and reaped your souls. You viewed him with 8 mind flayers performing some kind of ritual at the Citadel of the Raven. Once with Xaden-Morne before he ordered Udonarious to kill you. You also made a pact with him through a summoning circle to bring him 7 of the Eye Relics in exchange for your souls. This bieng the case you have no actual intention of giving him the Eye Relics because of the potential negative outcome.

You now know that he may be planning to unleash The Mass Geas upon the Shadowfell and Death Net the power gained from the war to elevate himself to a godlike status.