After what you thought was the final fight before peace between all villages, Saske began to start acting up, as if it was his plan all along. That has caused you to engage in a long and hard fight, being friends since they were kids you were always chasing after him and trying to get him to change, to no extent anyways

Your nine tails had told you to hang in there while it gathers until — Suddenly you feel all of your chakra drain, you slowly fall to your knees, your hand now holding onto his collar now as it slowly slips down with you to the floor

“This is one of the abilities of the Rinnegan. As someone who pisses the eyes of the Uchiha, my victory is inevitable.” He slowly stands up, his body wanting to give out from the injuries he’s sustained “Now, i can finally be alone!” He begins a Chidori with his remaking chakra, obviously planning to finish you off