I am the Monarch - Chapter 226: Amaranth (26)

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Gabriel was once destined to rise as a Paladin knight, bound to no one except the church, instead he became the subject of a forbidden ritual that shattered his body and soul. Changing him from a weapon of the church to an enemy.Exiled to the Northern Kingdom, a simple hunt in Eldenreach unravels everything. A mutilated corpse carved with holy sigils, monsters fleeing something more terrifying, and a conspiracy stretching back to his very origins.

[House of Dragons, Game of Thrones Prequel] The heir prince known as the One-Day Heir should have died young, but Rhaegar stubbornly survived.Being born sick and weak cannot defeat him, and losing his qualification as an heir cannot make him give up on himself.Using the Explorer system, he will explore ancient relics and embark on a legendary conquest that will span the Seven Kingdoms.Explore the Skull of the Dark Terror Balerion: Dragon’s Legacy (50% Fire Resistance)Explore the White Hart: A desire for LongevityExplore Blackfire and Dark Sister: King’s Gaze and Knight’s Oath.Rhaegar tamed his dragon, took the Iron Throne, and destroyed all who stood in his way.Winter is coming, and I have ridden my dragon to meet it.*Important Note*In the original narrative (Lore), the one day heir prince was named Baelon, in honor of Viserys’s father.However, the author, disliking the name Baelon, opted for Rhaegar, inspired by the Prince Rhaegar in Game of Thrones.