Harry Potter: Eclipse. - Chapter 46:

The eldest son of the assassin aristocrat Tuatha Dé.

The skill, experience, knowledge of the previous life, magic, all of which grows his power as an assassin.

Excellent assassins pass through. He was usually admired as the ideal lord, and behind it wielded a blade as an assassin aristocrat.

Life in hell mode was never fun? Was it?***********Being burned alive in a laboratory out of sheer jealousy for he had created the best AI system in the medical world? Oh boy, Damien could assure you that it was not fun. But then again, you never get another chance to feel the slow burn—okay that went dark quickly.Lets take it from the top once again.Damien was sure he had angered someone up in the sky and given his foul mouth that hurled curses worse than a sailor he had very good idea of how it happened.Because if being abandoned in the orphanage was not bad enough, he was stabbed by the very mentor he trusted and followed with closed eyes.But when he found himself waking up in another world— even after death he was not left alone. SMH.The world of beastmen —— he realised that he never knew how difficult hell mode truly was.Surviving in the world of beasts was a challenge in itself.And for Damien who found himself in the body of the discarded crown prince of the Brystoria Empire—With a broken nucleus and mana suppressed by Tartarite nails and used as a weapon of humiliation, it was not a challenge.For Damien, survival in the beast world was like walking on a thin rope, that too on one foot!Fortunately, the AI system that Damien developed as a doctor before his death followed him to this world of beasts. Join Damien in his new quest as he overturns his destiny from being a slave to the king of beasts.

He crossed over to a new world where humans have magical power. They are called warriors. They use their power to kill the monsters that appear out of nowhere. Dragons, Dungeons, and Magic users are pretty common in this world. If you want to live in peace, you need to have that power. You can also become a powerful clearing dungeon.

In this dangerous world, he has a system that can help him grow stronger. But he didn't want to be a high-profile warrior who attracts much powerhouse attention or become a lab rat. He wants to be Low-profile and grow strong using his system.

A character with extreme difficulty and the worst performance, Baek Yu-Seol was considered tr*sh in the game because he couldn’t use magic in a fantasy world where everyone else could.

However…

[Due to the wrong ending, 90% of Aether World has been destroyed.] [Please reach the ‘True Ending.’]

Suddenly, those words echoed in my mind before I was transmigrated to the Aether World.

[You can use the skill ‘Flash’.]

“Why did I possess this character?”

Flash was the only magic skill I was given.

Surviving in Stella Academy where many genius mages ran rampant, I became the notorious Flash Mage.