Without a doubt an incredible job, I've recently been exploring the world of portraiture, for now I try to master the graphite, I hope to try the charcoal soon and see what happens. I am a very follower of works like yours, especially those that share the process of their drawings through videos, many times I slow down the speed of the camera to see clearly how some "tricks" or techniques are performed that give more life to the portrait. In your case I loved the way you gave lights and volume to the skin of the symbiote, was a very professional job, I can only congratulate you on it.
I leave you the process of drawing the portrait of Dr Strange, made by myself, currently the drawing process is already a little more advanced, is made with graphite on opaline, I accept advice and suggestions
You master it well. The details and drawing is unreal! Good job!