Project X: The Mutant Hybrid system

Leo Krain in his previous life was an hit man.
His wife died seven years ago in a car accident with the heir of a multimillion dollar company Trek.
The CEO's son died in the car accident.
This led the CEO to hire assassins to kill Leo and daughter which in turn caused Leo and his daughter to go on the run for 6 years and 7 months eventually getting cornered by the CEO of Trek and his assassins.
Leo with hope that his daughter can become something great in the future gave up his life for his daughter's freedom.
...
Leo then opened his eyes to see that he was in one of those cliche sci-fi incubators.
[The Mutant Hybrid System Activated...
[Fusing with Host's soul...12%...53%...88%...96%...100%... completed saved]
"Isn't this one of those system things from webnovels" said Leo before having some strange black gu injected into the long tube connected to his container making him feel immense pain causing him to fall unconscious.