[No romance + Godlike heroine + System + Golden finger + Satisfying revenge] This book is also known as The Host Slaps the Chosen Ones and Sends Their Luck Flying.
Her name is Shen Zhen, a powerful woman of unknown origins.
She secretly bound a System from the Space-Time Bureau and spent hundreds of years at large before finally getting serious about completing missions.
Mission World One: The Fake Heiress and the Real Heiress Fight Over a Man (My scheming stepsister wants to steal my man? Here's two slaps to start!)
Mission World Two: Blood Hunters and Vampires (The male lead, who looks like a fried chicken drumstick, wants to make my sister betray her kind? I'll beat him up first!)
Mission World Three: A College Guy's Comeback, Starting with 99 Confessions to the Campus Belle
(An ugly guy shows up with flowers, hoping she'll reject him? I'll generously accept, make him fail his mission, and keep him ugly forever!)
Mission World Four is loading...
System: Host! Stop hitting them! Let's try being decent people!
Shen Zhen (pressing her palms together): No! I'm a god, not a person!