This is a high-concept idea that combines "timeline intervention" and "electronic warfare awakening". The protagonist has no overall vision of traveling through the past to save history. He is just a soldier torn apart by the war. His golden finger is "simultaneously listening to/storing war information frequency bands in the brain." He's not God, he's just a telephone soldier with crazy wiring. But every secret phone call made by the enemy will be intercepted, recorded and replayed by his brain. He wants to use these "voices of incriminating evidence" to completely destroy the enemy before they can take action.
