Raiden is the character from the video game mortal combat who possesses the power to harness the power of lightening. Radon is a radioactive gas that occurs naturally when the uranium in soil and rock breaks down. While both can be deadly, Radon takes time to attack it’s pray and Raiden can appear from anywhere and electrocute his victims in seconds.
Unfortunately, we can only detect Radon. We have no idea how to track Raiden, so we suggest you avoid him at all costs.