Harry Potter: Dimensional Wizard - Chapter 158: New Magic System (I)

A teenager who unexpectedly gets transported to the modern world from ‘the world of the immortals’ . He finds himself in the body of an ordinary guy. He wants to go back to his world and for that, he will have to practice to get stronger and investigate the reason why and how he crossed through to this world.

- Description from Novelupdates

Outer Sect Disciple Chen Yu, assimilates within his body a fiendgod heart.The heart, is the backbone of life, the human body’s fatal vital point. And it can be said that Chen Yu’s heart is actually his strongest defense point, and permits him to overtake demonic beasts, or divine beasts unlimited potential.Henceforth, he steps onto the stage and surges forth on a magnificent scale, in a heart-rending mysterious journey.Talented as a cloud, an unparalleled supreme talent.10,000 races glorious, cross boundary battles.Only my heart, eternal!

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