This was the most powerful defensive spell of the Demon Sect, the Blood Demon Crystal Wall. Those who used this spell could remain unharmed for a short time, but half an hour later, half of their blood would dissipate, and their cultivation level would greatly decrease.
Had it not been a last resort, Nan Wuwei would have never resorted to the Blood Demon Crystal Wall.
Compared to him, Mei Jiuqian was in a much better position; she and Nan Wuwei, both at the later stages of the Foundation Building period, were equally matched in strength. However, because of her innate charm and the pleasures she provided under the covers, she was rewarded with a magical treasure nearly at the Golden Core period by the leader of the Demon Sect.
At this moment, she had no choice either; she formed hand seals and released that treasure.
