Douluo: Strengthened Descendant, I, the Reincarnated Evil God Tiger

Note: The protagonist is the Dark Demon Tiger! Evil Readers of San Guan Zheng, please change the book. Cao Yi traveled across Douluo Continent and was reincarnated into the Dark Demon Tiger. After several years of wretched development, he finally awakened [Strengthening the Offspring System] From then on, among the powerful forces such as Wuhun Palace, Qibao Glazed Sect, and Blue Lightning Tyrant Dragon, there were all members with the surname Cao! Strengthen the descendant system: [If you pay ten years of life, your heir will receive randomly mutated martial arts spirits when they are born, such as Luo Sanpao, Fire Dragon, Evil Fire Phoenix, etc. [If you give twenty years of life, your heirs will be born with high-level martial spirits, such as: Nether Civet Cat, Evil-Eyed White Tiger, Diamond Mammoth, etc. [If you pay fifty years of life, your heirs will be born with top-notch martial arts spirits, such as the Clear Sky Hammer, Blue Electric Tyrannosaurus, Seven Kills Sword, etc. [If you give a hundred years of life, your heir will be born with a god-level martial spirit, such as Seraphim, Poseidon, Nine Treasures Glazed Pagoda, etc. "From now on, my Cao family will spread throughout the entire continent!"