Waste? I Carry the Memory of the Immortal Emperor Across the City

After being reborn as a cultivator, I know a little bit about martial arts, medicine, and mysticism, right? [Avoiding pitfalls] The protagonist just returned from the world of immortal cultivation and lost all his cultivation. He is not a brainless strongman who raised his hand to blow up the planet. Relying on the memory of the world of immortality, after returning, he used various dimensionality reduction attacks to reach the top again!