10 if i'm correct.

Thanks for the info.

If he steals any souls from dragons that the Dovakhiin kills, they will also be returned on his death.
So it can be more than 10.

yeah i had him steal 6 from me while i was hunting for souls for the last bend will word, and then the three from the final battle, and his. i'd imagine if you go out dragon hunting like crazy he would steal/give more.

I kinda wish his soul unlocked a unique shout...but then again I wasn't impressed. I didn't even give him the satisfaction of fighting another Dragonborn. I transformed into a VL and took him out that way.

I was sad that Miraak was using shouts left and right, while my character had to wait on the cool down to shout agian. I would've loved to have an unrestricted shout down with the dude.

maybe if you use the potion of fortify restoration glitch, you could enchant a weapon with soul trap on it , with an outrageous time limit, that way it will not wear off during the scripted event with ol herma mora, and trap his soul when he kills him???