Bruce Holland/Green Thing

Bruce Holland  was a scientist working on a Gamma bomb experiment. But when it went wrong, Bruce was killed in the blast. Since his body was irradiated, he couldn’t be buried in a normal place. He was put deep in the swamp where his gamma radiation leaked into the surrounding matter. Bruce eventually awoke, now fused with the swamp. Later, with the help of his friend Doctor Strangefate, Bruce was able to lock the swamp monster deep within him. It now only comes out when Bruce grows upset or outraged.