That feeling was like connecting a syringe to the suction pipe of a water pump.
Huang Yu's energy transmission efficiency was nowhere near enough to meet the demands of activating Fang of Annihilation. He could only operate it under an excessive load, which was why he felt uncomfortable.
Of course, Huang Yu's strength was naturally not as weak as a "syringe."
Although he had only just entered the Saint Domain, his foundation was profound and the energy within his body was extremely abundant. That was why he could drive Fang of Annihilation.
If it had been another Saint Domain, let alone experiencing a "draining sensation," it would not have been strange for Fang of Annihilation to drain them completely dry.
Of course, Huang Yu's energy was not infinite either.
Although Fang of Annihilation was powerful, it also consumed a great deal of energy when used.
The difference between Huang Yu and other Saint Domains using Fang of Annihilation was merely the difference between draining a lake and draining a tank.
Aside from that, using Fang of Annihilation to kill demons had another drawback: it could not leave the demons' corpses intact.
One had to know that the demon Huang Yu had just killed was a Demon Commander.
Its bones, flesh, and heart were all extremely valuable special materials. Their total value exceeded ten million Soul Crystals.
Of course, this was not the time to worry about such gains and losses. Huang Yu had to seize the moment and the opportunity, doing his utmost to inflict greater losses on the two Demon Lords.
Ding!
The lord killed a Six-armed Snake Demon Commander (Seventh Tier Saint Domain)! The lord obtained 96.23 million experience points and 77.64 million Soul Crystals! Void Devour activated successfully
Huang Yu used Fang of Annihilation to