Thanks @sparksofdawn , its was difficult which one to chose between the first three for me
Thank you @serovero , yeah the first three for me are my favorite, I've made the decision to go for the second one. Mainly because of the big head,
Spor - Sketch
What was running in my mind was fungus being the source of his power. I was also thinking of his past form and how I can show reference of that, that said - I put the skull of his former self in chest, that helps spread the fungus to control victims as well as the plant in his back. Notice how small the skull is, that's because he is bigger than when he was human.