This one was the most fun. I did it at Lone Star Comics in Arlington (closed) and before the clock started, I took a walk for an idea. I found a face down "Magic the gathering" card in the parking lot. I didn't look at it. I said THIS is my bad guy, shoved it in my pocket and went back in. It was a centaur. I have him in there, but the story evolved (THANK GOD) into this.