Wrong Delivery System, Use Gaowu to Conquer the Empress of the Immortal Realm

Li Changan felt something was wrong with the system: [Don't be afraid, host! Although you have traveled through time and been thrown into the cold palace by the Supreme Female Immortal Emperor, you just need to hold on and don't let the wave wander! This palace fighting system will definitely help you become stronger and eventually defeat the empress! Li Changan: Wait... This is Gao Wu! Impossible! Absolutely impossible! Host, you see, this thief is extremely talented, has profound cultivation, and has a vicious mind! Host, run away quickly! Reward: Empress Strategy Guide! Li Changan: This is my little nephew! The milk is not weaned yet! [Host, please note, this woman is a favorite of the empress, please pretend to take her poison and gain her trust! Reward: Jidao Emperor Divine Fist! Li Changan: Poison? It was obviously the big chicken drumsticks bought by my aunt! [Host, look, she is the Supreme Empress of the Immortal Realm! Go and please the Empress! Reward Magic Weapon: God-Destroying Emperor Banner! Looking at the blushing Qiao Qingmei, Li Changan suddenly realized! ....... Many years later, I looked at the artifacts and magic weapons in the storage space: the Zhuxian Sword to kill demons, the Shennong Pill to bring human flesh and bones to life, and the Demon Lord's Order to summon the world-destroying demonic army! Li Changan: System, I am invincible! You take me through time! I want to kill the immortal world and seize the throne of the empress!