The monks who broke their Buddhist vows from Shaolin Temple had more than just incredibly great fist and staff techniques. Their body fortification techniques, which they had trained by repeatedly striking their bodies, were also famous in the world of martial artists!
Compared to the Mystical Realm bandit leader Happy had killed earlier, the old monk was definitely stronger. Not only was his offensive abilities stronger, his body fortification technique even surpassed those of the Stone Giant in the ancient tomb, making him even harder to deal with.
It was precisely because of that reason that once Happy restored himself to his top form, he decided to treat the monk as the target for training his Flowering Knights' Song to the tenth realm. A Mystical Realm NPC would give him a lot more experience points compared to the Stone Giants in Blessed Realm!
