So many chapters wasted on fighting this little side character villain-wannabe, and it's not even over yet. If he had such powers hidden, he should've used them while the enemy wasn't yet expecting anything and just be done with it. It's idiotic to slowly increase your power and let the enemy adjust to it. You go for the immediate kill when the enemy isn't ready and keep pounding the "probably already dead" enemy until not even a single atom is left.