Martial Beast Tamer: 5 Animal Martial Arts and 4 Sacred Beasts

The World of Cultivation has dominant creatures called Beasts. They ruled the realm once in the past and humans cowered in their presence. But after the Beast King was befriended by humans, Beasts lived together with them.
With the discovery of the technique of binding Beasts, or what they called integration, the Cultivators became more powerful with their so-called man's best friend none other than the Beasts. Cultivators became enhanced by assimilating with them. Gaining the powers of the Dragons in their humanoid form.
Our MC Lee Xian, died after the Beast War. The 4 Sacred Beasts which were the Coiling Dragon, Crouching Tiger, Blazing Phoenix, and Black Turtle, held back the Evil Beasts from another dimension. And on his death, he was sent by the Time Dragon into the past to prevent their demise.
As a Regressor, he has knowledge of cultivation and will train his friends to become world shaking figures. To be the greatest defense of humanity. Also, he will go on an adventure to find again all his Beasts that he bounded with, in the past.