All people change their profession, god-level strengthening master

In a world where games and reality combine, fighting professionals are respected.
Li Yao changed his job and became a disgusting reinforcement master, but this reinforcement master is a little bit different from ordinary reinforcement masters...
Ordinary strengtheners can only strengthen weapons, but Li Yao can strengthen everything, even a stone can be strengthened!
...
[Congratulations, you successfully strengthened the stone and obtained the Terra Stone! 】
[Congratulations, you successfully strengthened the iron sword and obtained the magic sword Apophis! ]
"If everything can be strengthened... what about zombies?"
[Congratulations, you have successfully strengthened your zombies and obtained the Zombie King! 】
...
"Then...can I...strengthen myself?"
[Congratulations, you have successfully strengthened your physical body and obtained the Black Plague Body! 】
Keep strengthening and sanctify your body!