Quick Transmigration: The Cannon Fodder Host Has Turned Dark Again

【Strong heroine, satisfying wish fulfillment】Yan Jun is bound to a cannon-fodder System, yet she dominates her way to becoming a big shot, charging ahead at full speed! A cannon-fodder empress? An abandoned empress confined to the cold palace? If there's no hope of claiming the throne, she'll rebel against heaven itself, kill the emperor, and rule the world! A cannon-fodder older sister? A stand-in for the heroine? The male lead is acting up? Then she'll drive him mad, torment the heroine to death, and do whatever she likes! A cannon-fodder junior sister? Her entire sect slaughtered? Revenge is too easy? Then she'll follow the sacrificial ritual plot and offer her enemies' blood to heaven, rewriting destiny herself! System: ...This feels like the end. The Host is about to turn the whole world upside down!!!