From Shadows, I Devour All - Episode 4

A person preparing a Soulforging Rite needs demonic beast soul and six Blood Essence to sell extras and clear debts. While slaying beasts, their flea companion unexpectedly evolves into a queen bloodline and multiplies into a hundred clones. When too many beasts surround them and Nat might not handle them all, the flea user casts Prickly Field and orders the fleas to multiply. The clones feed on lifeblood and then detonate, leaving many beast remains and enough blood to level up. The group is stunned, forced to ask: was the flea really useless after all?