Where does the yellow and black king in charge of good luck come from?

The expression "the yellow and black king in charge of good luck" comes from the Cthulhu-style western fantasy novel "The King of Secrets" written by a squid who loves diving.

In this novel, Klein Moreti is the hero. He graduated from the history department of Hoy University in Rouen. Former tingen market value night team member, multiple identities, pseudonym. Klein is the third person to awaken in The Secret Master (fifth issue 1349, early morning of June 28th). Before awakening, his original name was Zhou Mingrui. He has dark hair and brown eyes, is thin, cautious and rigorous, and is charitable. Klein is also one of the founders of the Tarot Club, which is code-named "Fool".