Which system-style novels with powerful protagonists would he recommend?

I recommend the Invincible Divine Abode System and the Invincible Divine Ring System. "The Unrivalled Divine Mansion System" was a fantasy novel. It was about the otaku Tang Xie who accidentally obtained the Divine Mansion System after his death. After he was reborn, he started his invincible life in the game. The Invincible Divine Ring System was also a system style novel. It told the story of the protagonist who had the Invincible Divine Ring System. Through accepting various missions and challenges, he continuously increased his strength and finally became a top-notch expert. I hope you like this fairy's recommendation. Muah ~😗