Skreevos!
I wasn't entirely sure what I wanted to do with the design of Tensaided's monstrosity. I wanted it to look otherworldly and weird, but I wasn't sure how I wanted to convey that.
As such, I opened up a 3d rendering program called Sculptris and went nuts. Sculptris is kind of like working with some sort of ball of alien clay with infinite volume, and I somehow wound up with this monstrosity.
And yes, I gave it pectoral muscles. Why would you want a giant monster without decently developed pectorals?
What was frustrating about Skreevos in the comic itself is that I felt the angles it looked best at weren't the best angles to show it from a composition perspective. Zooming out would have made it look smaller, a different angle would have made it look weaker, Justin's perspective mattered more than a "hey, check this out" perspective, etc.
Although, technically, that wasn't Justin's perspective. That was how Grace imagined Justin's perspective. Darn it, I should use the "it's Grace's imagination" excuse to show whatever I want. It's the ultimate excuse.