I Borrowed an Immortal Emperor's Power from the Start, So Why Train from Scratch?

After transmigrating to a fantasy world, Qin Jiang, once the family’s greatest prodigy, inexplicably loses his cultivation and becomes a good-for-nothing. Luckily, he awakens the Strongest Advance System and can use the power of an Immortal Emperor from the start. However, despite possessing the strength of an Immortal Emperor, his cultivation is still only at the first level of Qi Refining. So the System makes him start cultivating from scratch. [Mission 1: The Host inexplicably lost his cultivation three months ago. Find out why, then raise your cultivation to the ninth level of Qi Refining and reach perfection.] [Mission reward: Divine-grade talent.] [Mission 2: Your relatives look down on you for being useless and weak. At the family tournament in three days, amaze everyone, take first place, and stage your comeback.] [Mission reward: God-tier comprehension.] [Mission 3: Your father has been humiliated. Help him recover his cultivation and reclaim everything that is rightfully his on the day of the family tournament.] [Mission reward: The Divine Sword of Heaven and Earth.] Qin Jiang could only sigh at this. “Why make me do this step by step when I could settle it all with one slap?” “What?” “You want me to take part in the sect’s disciple selection too?” “With the power of an Immortal Emperor, do I really have to compete with these weaklings for immortal fortunes?”