Wang Yu's judgement of an opponent's skills was very simple.
When his level was lower in the past, all those who did not die after one move of his were considered highly skilled players.
Now that his level was higher, he was still unable to instant-kill heavy armour jobs like a Warrior. However, anyone who could react to his moves was considered decent.
Even though Wang Yu did not use any skill in his kick, he hit Dragon Tooth under the ribs, which was a vital body part. Not only did Dragon Tooth come out unhurt, he even made use of the momentum from the kick which showed that he was quite agile.
For such a meticulous man like Black Dragon King, it made sense for him to have someone as strong as professional players to be by his side.
Judging from Black Dragon Guild's influence, their top player equated to the top player in the whole of Japan.