After Rebirth, Lu Mingfei and I Revisit Teyvat

How can I become the eighth god when I am reborn in another world with a useless person? Relying on talent, I am obviously mediocre. Relying on immortal roots, I have never cultivated immortality, but it doesn't matter. I have a system to let my ninth soul ring, infinity gauntlet, acquired holy body, iron man armor, and gun fighting skills let Tiyvat know who is the real person of Thunder Movie, Yao Shenzi, Xiao Gong, Keqing...! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.