He gets one in general for being the person to basically coming up will all of the strategies to help his allies win maou games.
Curbstomping a giant serpent water god actually a water goddess the very first day he arrives in Little Garden.
Curbstomping Lauis and Algol, the latter being a former celestial level maou.
Basically solved the riddle to the game The Pied Piper of Hamlin by himself.
Destroyed a dimension with his gift in his flashback.
A little bit before this, he hurls a building at his opponent at third cosmic velocity.
The titans in book 4 had basically pushed the Draco Gleif alliance back to the water tree in the center of Underwood, then Izayoi arrives and singlehandedly crushes the titans and pushes them back to the outer gates.
Oneshots one of the strongest species, a purebred dragon.
Fights Kouryuu the Saurian Maou, ranked third in the Seven Demon Kings to a draw.
Fights Highness to a draw even though he had multiple chances to win.
Even though he knows he will lose, he fights Azi Dahaka after Taking the Bullet for Kurousagi.
Compared to all above, punching a petrification beam in half as if it were glass seems mundane by comparison.
