Deadpool is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Fabian Nicieza and artist/writer Rob Liefeld. Deadpool’s primary power is an accelerated healing factor, depicted by various writers at differing levels of efficiency. The speed of his healing factor depends on the severity of the wound and Deadpool’s mental state. It works most efficiently when he is awake, alert, and in good spirits. Deadpool’s accelerated healing factor is strong enough that he has survived complete incineration and decapitation more than once.