Martin was a serial killer and psychopath,

He was working with different organizations for killing the people they want,

One day an organization gave him an address of scientist and they said they want that scientist dead.

Martin did not think about it so much, he just went and killed the scientist.But one thing he did not know that,

Scientist, planted a weird magical bomb in his house, after Scientist dead, Martin died as a result.

But this was not the end, The Magical Bomb that Martin was killed was a system, and after Martin died from the bomb, he earned a system in a world people are shapeshifters,