Saint Child Huo Yun's eyes flickered with terror as he discovered that the spiritual power within his body had been completely depleted in the span of a single breath.
This sinister black flame was burning through the spiritual power in his Dantian, and the speed of its consumption was terrifyingly fast.
The rest of the Saint Heirs were no different, their internal spiritual power almost instantly drained.
"Saint Heir, quickly activate your Bloodline Power to block the invasion of the flames!"
Several Protector Elders roared in anger. In just a short breath, more than half of their spiritual power had been expended, not to mention that of their own Saint Heirs. Wanting to struggle, their bodies were firmly kneeling on the ground. If this continued, they were afraid they would all die here.
What exactly was this flame that it could be so terrifying? Most crucially, why hadn't Cai Kunxu and Xiong Da informed them about such a critical situation?