Upon breaking through the third turn of the Nine-turn Vajra Body, a golden light emitted from Lu Yu's body surface. This golden light possessed extremely strong defensive capabilities, nearly immune to spiritual power damage at the level of the Qi Domination Realm, and exhibited high exemption effects against physical damage as well.
Being immune to spiritual power damage at the Qi Domination Realm differs in meaning from the ability of the Tiangang Mysterious Qi to resist damage at the same realm; the former is passive—standing still, Qi Domination Realm cultivators cannot cause any harm to Lu Yu.
The latter requires consumption. Although it can resist attacks from Martial Cultivators below the Sea of Qi Realm, Lu Yu's own spiritual power needs to be expended.
If Lu Yu does not replenish the consumed Tiangang Mysterious Qi, those at the Qi Domination Realm can eventually break through its defense by continuously attacking and depleting its energy.
