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Early the next morning, Lin Xiao went to ask his old man for a piece of monster flesh and blood, which was a tentacle from the unknown Tentacle Monster they had killed last night.
This monster wasn't very strong, its level was estimated not to exceed Level 20, making it the most suitable strength for a first-time fusion. Flesh and blood from monsters beyond this level contained a too potent eerie strength, not suitable for a novice's first fusion.
This so-called level was a classification of strength in this world, with a significant threshold every ten levels. Every time one surpassed this threshold, their strength would undergo a qualitative improvement. This applied to the monsters of this world, the Children of Nightmare who descended into this world, and the classification of strength for Lin Xiao and his kind as well.