Ken and his family experienced a great trauma when they returned to the City of Peace. Ken's wife Titania and his son Moriko were gone, the city was destroyed and there were brutally murdered corpses around.
Ken orders the Shadow Army to establish an empire to prevent these events from happening again.
The Shadow Army finds the right spot and builds the Shadow Castle and the remaining buildings in a few hours. Ken declares himself as the new Shadow Lord, but the other Lords do not accept this announcement and declare war. First, the Fire Lord attacks and challenges Ken.
Ken continues to fight against the Fire Lord using his shadow powers. The Fire Lord constantly attacks Ken in anger, but Ken easily defends his attacks and redirects his own attacks at the Fire Lord.
During the war, other Lords also fight alongside Ken and support him. The Fire Lord remains in a difficult situation and Ken's powers constantly increase.
The Fire Lord is too weak to stand any longer, and Ken knocks him out with his final blow. The Fire Lord falls to the ground and dies, and Ken wins the battle.
In the end, the Fire Lord is defeated and Ken triumphs. After the war ends, the other Lords bow to Ken and accept him as the new Shadow Lord. Ken ascends the throne as the new Shadow Lord and begins to rule the Shadow Empire.
Ken wins the right to rule the Shadow Empire by defeating the other Lords and begins to expand the empire using his shadow powers. At the end of this war, Ken became the most powerful leader in the Galaxy.