Martial Arts, What's Going on with the Demon King System?

Li Chuan traveled through time and became a bad gambler with a huge gambling debt and was about to be hacked to death. In desperate situation, he successfully awakened the golden finger. It's just... Something doesn't seem right about this system. What is the training system for the strongest demon king? It would take others months of hard work to condense a trace of Qi and blood, but he only needs to eat and sleep like an ordinary person to complete the systematic "monster survival mission" In the end, Li Chuan relied on the BUG of the card system and embarked on an extreme path!