Here are some renders of my high poly model of the Siva infested Mutant Iron Lord! If you want to see more, I also wrote an article about the process which contains some extra bonus images:
https://www.bungie.net/en/News/Article/45403/7_Chronicle-of-the-Mutant-Iron-Lords
And also here:
https://www.reddit.com/r/DestinyTheGame/comments/59xhn6/chronicle_of_the_mutant_iron_lords/