My System for Adding Points to Monsters

Su Yu traveled to a future city three years after the zombie apocalypse, where everyone practiced martial arts just to resist the zombies... [Kill a level 1 power zombie, gain +1 strength, +1 source point] [Kill agility level 1 zombies, gain agility +1, source point +1] Just by killing zombies, can you continuously add points to your abilities? Tide of corpses? The more the merrier! Just my mobile points bank. "In this martial arts, no matter how high you practice, you will be considered high!" "I, Su Yu, have made it all the way to where I am today thanks to my own hard work and persistence, as well as a little bit of talent and system! More points!"