This is Cosmoman. Cosmoman is a nickname given to the Time Lord known as The Doctor. He is from the Planet Galifrey, in the system of Kalabraxos. He is over 2,500 years old. Cosmoman's power is his smarts and the ability to regenerate. Whenever he is mortally wounded, his body heals itself, then his face changes, and he gets a new body. his personality changes too.
Nobody knows Cosmoman's real name. When he was young, he was always fascinated by the stars and wanted to visit them. His friend, The Master wanted to rule them. The Doctor ended up stealing a TARDIS (Time And Relative Dimension In Space). He went with his granddaughter. Later on, he got many other companions. He has also met famous historical figures.
The Doctor has many nicknames. Some are The Oncoming Storm, Raggedy Man, The Mad Man With A Box, Sweetie, and much more. He also has many enemies. His most infamous are The Daleks, Cybermen, The Master, Missy, Weeping Angels, and The Great Intelligence. The Doctor loves earth. He uses his skills to save Earth and many other planets everyday. Cosmoman isn't undefeatable though. The main way to beat him is to make him remember the last great time war. It was a giant war between the Time Lords and the Daleks. The Doctor ended up killing both races.