Upon Khrona becoming the Tree of Life, he transformed the Tree into Crystal, as to be a sort of sleeping chrysalis for himself until he was ready to be reborn for the final time. In this crystal state, he told himself that he would right everything that was wrong and correct things within himself and his family before he awakened, so that when he did, there would be no more chaos. In doing this, Khrona had to suffer the Insanity of a God, and the endeavors that a god had to undergo, plus align himself with all parts of himself and all sorts of things. It grew on him as he tried to create the Dawn Village, and eventually, simply stopped.
Oh yes, and at some point in time, Khrona and Nagase performed The Ritual to create a being of pure light, which was the consciousness of Khrona's new child, Trinity, who was born in the world of Dreams and Unconscious through Khrona's psychic connection with Titania in the world of Dreams. This was where Khrona felt the presence of the Queen of Dreams, and thus, needed to pull both Titania and Trinity from out of the land of Dreams that part of them was stuck in.
However, as he said, there was change coming to the Chaos and the Nightmare, as well, and the birth of the Astral Chaos and Neo-Nightmare was coming to be after the destruction of the three great deities that overshadows the lands. Zeik and Kurai had gone to the Great Spirit to gain access to the Dreamscape, and with that, Khrona went along as well to help them. He protected them from any force that would try to disturb them, and they went through the creation. As they went on with the creation of the Courts, Khrona was met with by Shinigami, who apparently, had some news about it all. He revealed his true self as a piece of Shinsei Tensei to Khrona, and told him that he would become the portal that helped create the Dreamsphere whilst Khrona could pull out Titania and Trinity. In his place, one of them would become the new Shinigami or 'Death' of the Dusk, and when the portal to the Dreamscape opened, Khrona used the Family Bond to pull them out and put Shinsei in their place, which led to Trinity becoming the new Shinigami.
Once that happened, Zeik and Kurai sustained the Dreamsphere with the Great Spirit (I think), and in the end, Shinsei, being pure and utter will, could just will himself out, which was his trick all along. Thus, everyone had a happy ending there.
But there was more!
Once Khrona had Titania and Trinity, he realized that they weren't truly connected until they had become part of the Tree with him, and so, he redid the Thirteen Restrictions and brought those two up with him so that they could be bonded with the Tree. Realizing this, he came up with the theory that anyone could do such a thing and awaken their full potential by undergoing the Thirteen Restrictions, as well. So, he made the Tree also a place for people to undergo these restrictions and become their 'true selves,' which he deemed as 'Shinsei' in honor of his grandfather. Though, things worked differently if one was of the Tensei Heritage. Either way, that's a different story.
In this time, he tried to help rid his village of the final evils left by Grimlock, which were the Four Guardians of Chaos. Though that didn't end very well the first time, as Savaj came and killed the Lich and the Lich did all types of mess to send Sophia and Alex Star into a dimensional portal. Alex was sent to Zita's castle, to confront the Lich that was within her, whilst Sophia was sent to Shinsei, who awakened more of her sleeping powers. Even though she wasn't a Tensei, she was 'adopted' into the family by him when he was Shinigami, so he treated her as a daughter to awaken her individual power, even though she had no true relation to the Tensei family.
So, with them by his side, he was able to further help create the Dawn Village, and also, the Mezzo Terra, and also, to rebuild the Dusk whilst also connecting it with the Depths, thus creating the Veritas. Though it was still a widely under construction territory, Khrona felt as though it were coming along nicely. But, he was wrong, and suffered more godly Insanity the more he rose up the Restrictions. That was when he decided that it was time to take matters into his own hands for correction of things that were going wrong, and awakened the sleeping Tensei gene within all who were related for the Night of Tensei (or, Friday the Thirteenth), so that he could get everything involving his family in order.
With this, he condemned Zita to hell, cut herself off from the Skull Girl, killed the Skull Girl and created a new being from her. Also, with the awakening of all the True Selves of each of the Tensei and the Grims, he attempted to accurately order them in the certain allotted time he was given; Thirteen Moons (Known as the Thirteen Tsukiyomi). However, at the end of the Night of Tensei, he ascended to the Thirteenth, and there was still stuff that was wrong. So, he was forced to start over.
Pissed about this, Khrona had to wait until another Friday the Thirteenth to issue the Night of Tensei AGAIN, and try to get everything in order AGAIN, only to find that he ran out of time AGAIN and ascended to the Thirteenth AGAIN and had to start over AGAIN.
Doing this was driving him insane, and he had already tasted the power that lay up at the Thirteenth; to see his true self, yet not be able to stay in such a form was... Torture. He wished to awaken so very badly, but there was still so much that was so very wrong. So, he decided that he was going to have to wait and understand himself, his world, and all other things about his family and his people before he could truly go to the Thirteenth one last time and stay there, in his True Form. With that, the Age of Crystal would be broken, and Khrona would be freed from his chrysalis and move on to Peace. This would come with the final Night of Tensei. In the meantime, he focused on helping his people and ridding his land of evil.