Honestly, no clue. There are a couple of those double models in the game. You'll see that there is an "Abomination (Cinematic)" UNIT in the Undead unit palette.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory