One of the most bizarre superhuman abilities is the power to control your own biology. The reasons for this are numerous. For example, one could grow tentacles out of their own flesh, sprout another head out of the inside of their throats, or turn their stomaches inside out so they could spray their stomach acid on their enemies. The ways one could alter and manipulate their physiology are virtually limitless, creating countless grotesque forms. In some cases, the individual could use their warped body parts to assimilate other life forms, therefore adding to their monstrous size and appearance. I am thinking of giving this power to one of the villains of my sequel series and I will base the forms they will take on what I see in my nightmares. Just thinking about it gives me chills.