Back during my MLP stage, I happened to be a huge fan of Team Fortress 2 as well. Not quite sure when I came up with the pun, but basically Mareasmus is a play on the words "Mare" and "Merasmus"; the latter being a lich/wizard from Team Fortress 2's Scream Fortress 2014 Halloween event with the former being a term for a female equine.

Although not as detailed and much more fandom-centered then my other pieces, I find this one enjoyable due to the amount of detail and effort I put into it. I remember the little squiggly things, which are suppose to represent a portal of sorts behind Mareasmus, being a pain to draw but really help with the otherworldly/unnatural feel that Mareasmus possesses.