User blog comment:Roxashasnoheart/Who would win? Alduin or Mehrunes Dagon?/@comment-92.239.156.155-20121218065029

Here.

According to one creation myth, Mehrunes Dagon was once the  Leaper Demon King, a kindly leaper demon and a low spirit who was one of the last spirits to be eaten by Alduin  at the end of every kalpa. Dagon plotted with the Greedy Man  over several kalpas in an attempt to kill Alduin. Together, they distracted Alduin at the kalpa-turning in order to hide parts of the world (Mudnus ) away from him. At the start of the next kalpa, they would add these stolen pieces of the world, hoping to eventually make the world too big for Alduin to eat. Alduin eventually learned of their plan, and cursed Dagon so that he could no longer jump. Alduin banished him to the Voud  Dagon was tasked with destroying all in the world which was stolen from previous kalpas, but he could not enter Mundus except during an auspicious time after a lot of hard work and ritual. Only after all fragments stolen from previous kalpas were destroyed could Dagon regain his "jumping kind of happiness" again, but the spirit knew this to be impossible, as he and the Greedy Man had stolen so much from the previous kalpas and had crammed them in at random. Dagon then begged Alduin one hundred thousand and eight times to retract the curse, but while he was begging Alduin devoured him and began a new kalpa