Krizantem

Martin became an orphan when he lost his family in a mysterious accident at a young age. Although he was orphaned, it did not affect him because of the mental problems he had. When he grows up to a certain age, he joined the world of crime and began to improve himself.within 10 years he became one of the most dangerous serial-killers known in the dark world. He also started killing people for money.

But he died of an explosion on his last mission. He also had a system to help him in this new world.

A soulless and emotionless serial killer from the old world had to give life in a fantastic world. But what he didn't know is that the powers that were possessed in this world would change itself.
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Supreme Lord Shapeshifter

Monistan (Monster Island Turtle) knew that the human-like being in front of him knows his name now, this means that the being he is facing right now is not a being that he could just kill with ease.

"So, let's start already"

After these words, he just used his ability "The Unknown Fate", and then created a black-sword made up of his body which is Black Liquid.

Martin only uses his original clan-sword if he needs it, other than when he was fighting against a being or a creature at the power level of the same as him or weaker than him, he did not like to use his original sword.

Monistan saw that human-like being created a sword and after that, he stopped thinking and used his all power to attack the Martin.

Island Sea Monster - Silver Soul Sword - Chapter 269