A man got bitten by a sea monster on his frontal and parietal part of his brain. He came back from the dead with the similar abilities as the sea monster. Speed underwater, grew sharp teeth, strength, and feeding on people.
This human just got killed by a sea monster.
Oh no, AM I DEAD? AM I IN HELL?!
BAHAHA! YES! THAT OCEAN MONSTER BIT OF A CHUNK OF YOUR BRAIN!
Human goes to hell
PLEASE, I DON'T WANT TO DIE!
OFC YOU DON'T! FORTUNATLY FOR YOU, YOU CAN RETURN TO THE LIVING. BUT I MUST WARN YOU, YOU WON'T BE THE SAME.
demon warns human
demon explains parts of the brain
YOU WON'T BE. THE SEA MONSTER BIT YOUR FRONTAL & PARIETAL PART OF BRAIN.
AH NO! i DON'T WANT TO BE A GHOST EITHER!!
demon tells dead human that he will become a monster
THE MONSTER'S TEETH HAD A VENOM THAT EFFECTED THOSE PARTS OF YOUR BRAIN. YOU WILL SOON LOOSE CONTROL & HAVE SIMILAR ABILITIES AS THAT MONSTER.
Soon the man would uncontrollably transform into a monster megladon and ate everyone and everything in sight. His secret identity is the man he used to be. He is a villian but unwillingly