Invincible Under The Sun
A person described as "Invincible Under The Sun" is the strongest in mind, strength, and spirit. You could numb it down to be the "strongest" to live on earth.
Guy 1: Wow, that fight was crazy!
Guy 2: Yeah, its as if he was Invincible Under The Sun!
Guy 2: Yeah, its as if he was Invincible Under The Sun!