I Borrowed My Way to Becoming a Demon God, and the Ruthless Empress Called Me Big Brother from the Start!

In a fantasy world, Gu Sheng transmigrates and becomes a tiger beast! By chance, he awakens a System that lets him cultivate immortality... or rather, cultivate as a demon, with loans! By offering his hunted prey as collateral, he can temporarily borrow all kinds of resources from ancient beings through the System. But Gu Sheng accidentally discovers a... bug. It seems this System doesn't check your credit! And so, Gu Sheng sets out to milk the System for predatory loans! Interest? Take it up with my credit score! Step by step, Gu Sheng cultivates and evolves from a wild beast, ultimately reaching the realm of the Eternal Demon God! Meanwhile, the two other tiger cubs born of the same mother as Gu Sheng are completely stunned! I was once the supreme Empress Xuantian of the human race. I fell in battle against a mighty demon. At long last, I was reborn, and thought I could easily regain my cultivation and return to the Emperor Realm. But I unexpectedly came back as a wild beast... and even ran into an old nemesis from my past life, the Heaven-Swallowing Demon Emperor. His true form was a Heaven-Swallowing Hou, and he had defied death to live a second life in pursuit of the supreme realm above the Demon Emperor. Wait! This is the Primordial Realm of Xuanhuang? The origin of the Myriad Worlds has now become a world where the laws of cultivation have withered, a land where the Dao is severed! Both Empresses are utterly stunned! But then, after witnessing their own cheap big brother evolve at a mad pace from an ordinary tiger beast, both Empresses are completely dumbfounded! What do you mean, big brother, you're about to become an Emperor?