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Stein had never unleashed so much power before. He always thought he was sometimes powerless, or that his power had limits… he always believed that the limit was on his own stamina, or something…
But now that he was a ghoul, a half-vampire and half-zombie, he couldn't believe that he was going even further beyond his own power limits. He was going even further his own understanding of his own power… he was breaking his limits!
This was his power, the power of… Titan! The more willpower he had, the more it grew bigger, and now that he wasn't a mere human, but had the amazing resilience and endless stamina of an undead and a vampire, he had reached the ultimate apex of his power, if not even more.
He had the power to enhance his strength through willpower and shape it as an aura, the ultimate main character ability! As long as he had willpower to do as he pleased, he would continuously grow stronger without stopping!
Check "The Protagnist's Sister Is Actually the Strongest"!