Poison Gas Apocalypse: I Have a God-Level Feedback System

[Apocalypse + System + Ability + Evolution + Not the Holy Mother] Poisonous gas fills the air, plants mutate crazily, and humans struggle to survive! In this world shrouded in poisonous gas, only 10% of people can awaken their powers and become those with powers that can resist poison. Yun Qianbai, a young man living in a slum, lives with his seriously ill sister. On her birthday, her sister was critically ill and was turned away from the hospital. In despair, Yun Qianbai awakened the god-level feedback system! By absorbing poisonous gas, you can gain poison value, evolve your own attributes, and even grow green vines as plant tattoos that symbolize supernatural powers! He found that he had begun to absorb the poisonous gas of the ghetto! From then on, Yun Qianbai embarked on a counterattack. Can he use the system to survive in the poisonous apocalypse, protect his sister, and uncover the hidden secrets of this world?