Golden Heart

You were in the war as part of an elite unit. After his injuries, doctors placed in your chest a heart of gold, as it was the only way to save your life. After transplant, your body will start to regenerate at a very high speed. A lot of black magic fanfiction prey on you because they think you have a great sacrifice to their gods. You fled from them and accidentally fell into a magical forest, where lost. Look for a way out.