As an Immortal, I Can Obtain Characteristics by Making a Contract

Ang Lee gained a mysterious ability - "Contract Characteristics". As long as the contract is reached, a certain characteristic can be extracted. As a "newbie gift package", he also received immortality. However, what are the conditions of the contract? What are the objects that can be contracted? ——The system has no prompts and no tutorials. For a whole month, Li An lived in confusion until one day when he was sweeping a grave in the countryside, he encountered his first strange creature: the shadow dog. His first contract was successful - "Characteristic: Shadow Stepping": stepping on the opponent's shadow can suspend the opponent's actions! Since then, Ang Lee's fate has completely changed. A blood-stained magic knife gave him "Sword Qi"; a seemingly ordinary rubber ball allowed him to master "Hercules", which doubled his strength...