One Hundred Thousand Years of Tribulation by Heavenly Thunder

After transmigrating into a cultivation world, young Fang Lingxiao rises to greatness with a talent that defies the heavens. In just a hundred years, he reaches the peak—the Great Ascension Stage. But during his final tribulation, the heavens unleash something unimaginable: a lightning storm that rages not for days or months, but for a hundred thousand years.
When he finally emerges from the ordeal, his cultivation is shattered—reduced to that of a mere mortal. Yet, his body, forged by countless years under divine lightning, has become indestructible.
Soon, Fang Lingxiao realizes the truth—this wasn’t fate. It was sabotage from a powerful figure in the Upper Realm.
Now, with his cultivation lost but an unbreakable body as his weapon, he sets out on a path of vengeance. He’ll uncover the traitor, climb the heavens once more, and make them all pay.