Fighting against Silver Wolf had been one of Happy's greatest wishes in his previous life, and it was also one of his regrets, because he had never managed to fulfill that wish. And yet in this life, Silver Wolf had decided to come to his doorstep to challenge him. There was no way that Happy would not appreciate the chance.
However, right when the duel started, Happy was deeply shocked by Silver Wolf's battle tactics and schemes.
Parting hooks! Boomerangs!
Happy could tell at first glance that Silver Wolf did not use any hidden weapon technique set by the system.
He simply used his understanding toward boomerangs, his miraculous techniques, and his control over the timing of his boomerangs as well as when he should send them out to reach a stage where he could fight so calmly that he was terrifying.