Eventually, Ken finds the Temple of Time and takes a look at all the knowledge written there. Written on the temple walls is how to become the God of Time, and Ken learns it.
Before the current God of Time became the God of Time, he went to the Beginning of Time and forged the Sword of the God of Time on the First Star, thus completing the sword. If he puts his own aura into the sword, he will have completed the final stage of becoming the God of Time.
Ken destroys the room and does not allow others to learn this information. He then breaks through time and travels back to the Beginning of Time.
He goes to the First Star and sees the God of Time. However, Ken went back to the time before he put his aura into the Sword of the Time God. He attacks him when he lets his guard down, the Time God takes out his sword and attacks Ken.
Ken fights with time spells and drives the time god away from the sword. Meanwhile, Ken uses his time powers to alter past events and thwart the time god's plans.
In the end, Ken manages to defeat the time god and puts his own aura inside the Time God's Sword, completing the final stage of becoming the Time God.
He becomes the God of Time and Ken could see all possibilities of the future and past without going into the future or past. From now on, Ken will control the entire universe and rule all time.
Ken erases the Old Time God from time with his new power, the Time Paradox ability. In this way, he will be the absolute power in the universe and all other powers will be under his command.
Since Ken was the God of Time, the Time Lords became his soldiers, and the Temple of Time became his Castle. In this way, he achieved Ken's dream of becoming the God of Time.