You are an immortal being who has wandered the Earth for thousands of years, acquiring many ancient mystical techniques that have transformed you. Now, you must fight to save humanity, while searching for the truth behind your immortality!
Transformation into Mist – You can change yourself into a mist-like form at will, enabling you to pass through any barrier!
Now, you protect Washington D.C. from escaped dinosaurs, while also battling the evil plans of Nowhere Man!
I imagine him as atoning for past crimes, using his immortality and mist powers to help people. He comes out of the mist, helps, then disappears once again into the fog.