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Within Yurei's interior, after a few days since the birth of Vritra, Clishya was sitting cross-legged, while wearing her usual Adventurer Guild Receptionist clothes.
She was closing her eyes tightly, as she slowly concentrated on the task given.
Her Mana flowed like constant energies of magical and ethereal properties, rushing across her slender and beautiful body.
Her Mana Core resonated with it, and so did her soul.
After reaching high enough, a person's Mana Core fuses with their soul, and Clishya was in the stage where that was slowly happening.
A Mana Core is a special organ that every living being with enough power can create, even tiny rabbits have one, although not most insects unless they're monsters. There were certain requirements in the mana density and mass that a monster needed to actually get one.
Check "The Protagnist's Sister Is Actually the Strongest"!