I believe that the cabin was the Nemesis/otherman's home (it's black and he seems to like black). jacob found a way of imprisoning the otherman by a ring of ash. The otherman then used the smoke monster to impersonate dead people eg Christian to intice Claire and give Locke orders. Remember, it was Christian who told locke to die so he could get the others to come back to the island. I believe this was part of the otherman's plan so he could use the smoke monster to impersonate a dead locke and get close enough to kill jacob. you will have noticed that Locke didn't kill jacob, i believe this is because he is the smoke monster controlled by the otherman. back to the ring of ash i believe Claire broke the ring and released the otherman.Read more >
I think Jacob's Nemesis has been using dead people for longer than we all think! Is it possible (i think so) that the Nemesis used Christian Shephard dead body when it crashed landed on the island in Season 1. I also think that the Nemesis used Claire to break the ash line which surrounds the hut so he could escape and finally kill Jacob.
I have additional evidence to back this up: Firstly, it was Christian who told Locke to get the Oceanic 6 back and he told him he would have to die to do it. Was this part of the Nemesis plan to finally use a body (John Locke's) to get close enough to Jacob? Secondly, since Locke's reincarnation we have not seen Christian on the Island. Thirdly, The smoke monster told Ben to follow Locke's every word. …Read more >