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"No, you have to share, Erika."
I stopped her as I took control over the enormous Soul Flame. Soul Flames were different than a soul itself, they were an expression of the Soul's strength.
By absorbing them, it is possible to gain some bonus stats, and strengthen our own soul, elemental power, and restore both Mana, Ki, and Spiritual Energy.
Because I am not as merciless as I might seem, I usually don't devour the soul of literally everything I defeat, even the souls of demons are usually spared, unless I need to strengthen my soul.
I am quite merciful in that regard, only usually taking half of my victims' souls, while letting the rest go… I could be even more merciless and eat them all.
However, as someone that has died and know what reincarnation is, I dislike negating this privilege to other souls, because I wouldn't had liked if the same happened to me.
So usually, even if I devour a soul, it is only half of it.