So, if my Tokkal Hammer Technique reached lv4, then there's a good chance I could learn the secret skill 'Rising Dragon Hammer lv2'!
However...
The secret skill 'Rising Dragon Hammer lv2' has high requirements for both Strength and agility.
It's understandable that it requires a high Strength, needing to reach 18 points,
but the requirement for 16 points in agility left me a bit puzzled.
After some thought, I figured that it's probably because to achieve the best effect of the 'Rising Dragon Hammer', you need to hit the enemy's chin!
To do this in the rapidly changing conditions of battle, obviously, without sharp observational skills and swift speed, it's not possible.
Additionally, I thought of something else!
The secret skills of the Tokkal Hammer Technique are not limited to just the 'Rising Dragon Hammer'. The outline also records another skill named 'Earth-splitting Hammer', which has even higher requirements than the 'Rising Dragon Hammer'!