Top 5 Reincarnation System manhwa / manhua with Great & Unique Story 

 1.  Supreme exorcist.

Protagonist bai zu  transmigrates into a world full of humans demons monsters and gods where he discovers that he can utilize an accessorized system to raise his body's stats he explores various forms of martial arts and techniques masters cultivation theories and Acquires experience invents his own techniques and embarks on the path of slaying demons exterminating ghosts and fighting bandits.

2. Cultivating the supreme dantian.

 As a divine son kim shu the son of a divine king was born with a mortal body and a mortal life and was despised and rejected by the people of the heavenly dao realm. It was not until he opened the universal sign-in system that opened his eternal moving dancing at the chaos heaven giant peak then he started from the lowest level of the god dao world fought with shura fought with ghosts and gods and fought with martial emperors and by his own strength he cut down all who stood in his path and broke through the top of the 98 and 11 heavens alone this is a decent enough manhwa for hardcore cultivation manhwa fans

3. The Strongest Tang Xuan Zhang.

 Usually people become a hero after they travel through time that didn't happen to the main character he was abducted by a system and now he is a puny monk in the world of journey to the evil land and that isn't the worst part the system Is basically his disciples are rebellious and he's got a bunch of deities trying to hunt him down but that's okay after all he is the mightiest monk tang shuan zhang. Yhe story plot is pretty interesting taking one of the most popular chinese story the journey to the west but giving a twist in the original the gods were good. But in this manhwa  the gods are actually evil and it is full of comedy. 

4. The story of a low-rank soldier becoming a monarch.

 When the mc was 15 he lost his right hand on the battlefield when he was 24 he mastered the skills that were necessary for his survival but he was always told the same thing. Over and over to just quit but if you weren't disabled you could have learned anything you wanted with nothing holding you back when he was 39 he lost his left hand and fell off a cliff and when he swallowed the artifact he had no knowledge about he was reborn as a 15-year-old rookie and he had a system window pop up in front of him. From weather-worn mercenary chris to young soldier chris it's the story of a skillful lad that found the glory on the battlefield 

5. It starts with a mountain.

 

A strategic leader gets isekai into a war dynasty he only has a group of members who were planning to ditch him facing this war era he thinks of stealing food and girls to live a king's life he is hot blooded picks fights with war Heroes. How will he bring chaos to the war will he be able to rise up high it is quite an interesting story where mc builds a town at first it really reminded me of doomed to be the king this is a super awesome manual i highly recommend it mc is cunning and ruthless.