C1882 The Qi of Yin and Yang

The Heaven and Earth Combat Qi could greatly enhance a cultivator's physique, and at the same time, it could make them immune to the Spiritual Sense's attacks and remove all kinds of negative effects.

Such a powerful divine ability naturally had to pay a hefty price. It required a cultivator to burn their own essence energy. Unless it was absolutely necessary, Yuan Fei didn't want to use it