Transformation

"Demon Lord, what should we do now that there's one less demon?" Another demon suddenly asked after sensing the death of the demon Yuan had slain.

"Change? Nothing will change, except that we'll have more blood now to consume that he's gone. Perhaps we'll even be able to attack those annoying things a few days earlier now." The Demon Lord spoke as it turned to look at the other 3 demons.

"There used to be hundreds, thousands of us. However, that fucking human with the Sword Aura slaughtered us as though we're insects, and in just the span of a few years, our numbers have reduced to a mere dozen…"

Unlike humans and magical beasts that have to increase their lifespan through cultivation, demons have a near-infinite lifespan at birth, meaning they're immortal regardless of their cultivation base.