Miraak's Temple was near those Nords Sero and I assisted last time. It too had a mind-control stone and a lot more people working on it than in other places. The warrioress Frea was also here, trying to wake up her people to no avail. In true Nord fashion she then turned to me and asked for my help in killing everyone responsible. Hell yes! We go down into the depths of the temple underground, easily dealing with Miraak's cultists (side note: he has the smallest cult ever).
Pendulums, why is it always pendulums?
Near the base is another black book which I use to warp to Apocrypha but this time get stunned by Miraak's magic cutscene! Apparently the ex-dragon priest and self proclaimed "first dragonborn" now resides in this realm and has not only a few dragons under his command but all the horrible fish men too. Then he does the traditional bad guy mistake of letting me go. Guess he hasn't read the tomes on being a genre savvy villain!
I made friends with Cthulhu.
Back at Solstheim, Frea takes Sero and I to her village which her shaman dad protects with magic, just not very good magic since half his villagers are working on a nearby obelisk. Shaman dad tells me that I might be able to free those stones from their corruption with a new shout. Finally, a way to get back at Miraak - by yelling at his stones! That sounds like a job for a hero... :P