Setting: SI/OC insert
Starting time period: mid way through the third shinobi war
MC/OC/SI: Same age as Kakashi
Chakra nature: Fire, Lightning, Yin release (Dark)
Possible relationships: open
Concept idea:-
Reborn into the naruto world, OC/SI isn't a fan of being tied down, his goal, become strong enough to defeat all and then go off on his own to live free and not worry about people coming after him. When the war comes he will end things before they get serious he will not be anyone's tool.
If Madara can become a legend why can't he use his knowledge of canon to become even stronger, knowing where every treasure is hidden from knowing the series he will grab them all and rise to the top of everything, nothing will stand in his way.