Maybe this story ?
Another nice trick can be that you, the MC, is a new hero (male or female : I really hope you can choose between both genders!)
who is Soul Forched with the Divine One, a new unknown trick Damian maked this trap fro the Divine One, weakened after 50 yezars the Divine One coudn't stand this bloody trap of Damian !!
So now your journey can go on and in different ways you can make an end on Damians forses & his life by the end :
1) find the Divine One and together fight Damian, but that's maybe the most fast path to glory, but also the most tricky one because if you or the Divine One get killed, both are stone dead and Damian and his allies win at the end !!
2) find the Divine One AND find Zanddalor who knows another way ... find/make a strong elixir or whatever that undo the Soul trap Damina maked !! A very dangerous & long difficult task, but if you succeed you or the Divine One can risk his/her life to undo the Soul Trap and mislead Damian (who didn't know you unod the Trap!) ... etc ...
3) you only meet Zandalor first and find a secret passage into Damian's headquarter, steal Damian's Soul Trap Formula and make your own Soul Trap on Damian ... so that you can kill him by surprise

via killing ALL his allies ... or whatever you like ...
4) Or ...
Ooo yes, Divinity III will be fantastic !! I really hope you, the MC, can fill your own pages of your journey .... as a big assy or as a sneaky snapsy or a blasting mage or ... whatever is big pleasure & fun to play ... with an open skilltree and 1 special starting skill for each kind of character (to strengthen the replayability) and random loot, robes for a mage or priest etc etc ...