I, the Time Ancestral Witch, Am Invincible When I Sign In

[Travel + system + multiple female protagonists + prehistoric flow] Lin Chuan, a modern man, accidentally traveled through the prehistoric world and became the ancestor of the law of time, Zhu Jiuyin, and activated the [God-level selection system]. When the ancestral witch is about to face the catastrophe of the lich, how can Lin Chuan lead the witch clan to break through the catastrophe?