"In D&D lore, "He Who Was" is a name or title for a god who was slain by his own archangel, Asmodeus. He was known for good and possibly peace, and is implied to have been the creator of humans. His domain, the Nine Hells, was originally his astral domain, now a prison for Asmodeus and his devils. Knowledge of his name was erased by the devils because they feared its power to revive him."

Basically he's thee god, at least for humans. :p

Possibly an unpopular opinion here but I feel Act 3 was where Larian really dropped the ball. We were supposed to get to the upper city and a way to fix Karlach's heart. (It's why Dammon has an infernal forge in his home.) So many of us would have gladly paid to get an upper city DLC but the team wanted to move on sadly.

Solid addtion? Last I heard people were calling this game Failguard. The fact they're not doing a DLC speaks volumes. I don't understand why more games don't drop DLCs now. The devs spend a decade on a game, why not add one? More offical armor and other cosmetics would be nice.