Bog Standard Isekai - Chapter 11Book 3:

Hao Yan Che is an immortal and Yuan Gun Gun is a mortal.

Aoki’s resolute face was indifferent. “If the sun doesn’t shine on me, please let me be surrounded by darkness!”
From a different perspective, look at the entire Pokemons world.

- Description from Uukanshu

Liu Duo was a young girl whose grandmother sold her to four brothers with the intent to be a bride. Unwilling, she ran away the following night, only to fall unconscious while trying to get away. Unexpectedly, however, she was reborn with the spirit of a 25 year old woman, also named Liu Duo.

- Description from Novelupdates

Here, only those with spiritual roots can cultivate while those with mortal roots are destined to stay mortal.

Mo Wuji only has mortal roots, but will he only remain as a mortal?