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Right above Kireina, a huge gate of flames opened, as Satan summoned the fists of his true body into battle! It was a power he could only bring for a second or two at most, but his fists were incredibly fast, fast enough to easily reach Kireina and pulverize her into the ground, slamming her as if she were a mere fly!
BAAAAAMMMM!!!
"Urgghh…?!"
Kireina vomited blood as she felt her insides shattering apart and breaking down to pieces, Satan laughed as the giant fist he summoned disappeared in a mere second!
"You shouldn't had looked down on me!" The Archdemon of Wrath was gasping for air, his entire body covered on all matter of deadly wounds himself. "Hahahah… You've forced my hand, quite literally!"
As he walked towards Kireina, he quickly noticed her body suddenly beginning to turn into slime… regenerating instantly and reforming right in front of him!
"What…?!" Satan was completely shocked!
Check "The Protagonist's Sister Is Actually the Strongest"!