Board Thread:Questions and Answers/@comment-1031724-20161029080114/@comment-3347453-20161029145502

1) Strange traps Dormammu in a time loop where they live the same moment over and over again. Dormammu repeatedly kills Strange, but realises that he will be trapped in that moment forever unless he fulfills Strange's demands. Strange promises to release Dormammu from the time loop if he ends his assault on Earth, takes the Zealots with him and never returns. Dormammu reluctantly agrees to this and Strange returns to Earth. Karcilius' flesh starts melting away and he asks what is happening, and Strange replies that it is "everything he always wanted". Kaecilius' goal was to cheat death and make life everlasting by having Earth join the Dark Dimension, but the Ancient One warned him that this existence would be a miserable one. Kaecilius and the other Zealots are then turned into these skeleton-esque forms as they are pulled into the Dark Dimension.

2) Dormammu is pretty menacing. He doesn't look fiery like his comic book counterpart; instead he looks like a mass of dark energy in a humanoid shape. His voice is very deep and powerful and quite distored; it's actually hard to tell that it's Cumberbatch voicing him. As for how powerful he is, he kills Strange in a variety of ways when they are in the time loop and Wong describes him as "a being of infinite power".