Li Xiaobai understood in his heart.
The System hadn't provided much explanation about the use of Hellfire; he could only grope for answers on his own.
Unexpectedly, he had not yet tested the power of these flames, but the Sea Clan overlord had discerned it first.
This meant that his Hellfire would burn cultivators while devouring the Spiritual Power within their bodies, ensuring that once their Spiritual Power was depleted, they could easily be reduced to ashes in minutes.
This was indeed good news; with his invincible defensive power, he had no fear of attacks from other cultivators. Going forward, he could simply wander around with Hellfire ablaze and it would enable his advancement.
As for the extent of its power, he would still need to test it concretely. The overlord beneath the waters was freakishly strong, like someone who had cheated, and wasn't fitting as a reference.