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

After Saberin heard that Martin could find a way to increase his power he started thinking more positively about him.

At first, he felt that he was going to be used this man but it seems like what he was thought about Martin is not true at all.

As they were sitting, Saberin started talking about his old-times,

The times when he was still a basic sabertooth creature but because of some kind of stone from the space, his ancestor found when they were hunting in the grasslands, they started evolving.

At first, they were just started having more information and intelligence compared to an animal, and then later on the line their stature started changing and they adopted a humanoid posture and started using spears and other tools for hunting.

With this new improvement they could easily hunt the biggest and strongest creature, they became essentially a human tribe with more stronger and powerful bodies.

Blue Ears - Hunt - Friend - Chapter 299