Sengoku Rebirth

The Sengoku Rebirth (戦国新生, Sengoku Shinsei; literally "New Birth of the Warring States") is the ultimate goal of Seireitou Hyūga. Being a man that hungers for conflict and burning with a singular desire to continue the growth of strength and abilities, Seireitou's true dream is to resurrect the Warring States Period and subsequently abolish the hidden village nation system from the world entirely; dragging all people into an era of war in which the world will return to a state where warriors are not only respected but will become the center of everything.

The Plan
"I clung to power, just as Kaguya did... Because I needed purpose. Those villagers, the elders of the Hyūga, and so on... looked to me as a monster. A demon without nothing to offer them but destruction and mayhem to their way of life. But this was because it was a time of peace. Those with power are not needed in a time of peace, but in an era of conflict... Even if they despise him, they will flock to the one with power. They will depend upon him... even if they hate him... because he is the strongest. And their only hopes of surviving. That is... how a monster like me... can create bonds with others."

- The motive behind Seireitou's plan.