Any possible ways to modify the consumption of Skill Point?

[ValkyrieCK]

I would like to change the consumption of skill point.

I did some research on "Adding new skill" from rAthena Wiki. Here is the link.

And hope to find some possible way to modify what I want.

But there is mentioned dev can modify the skill status (damage calc, cast time or skill tree etc.).

 

Anyone can help me figure it out?  

Edited March 26, 2016 by a22041100

[Haziel]

Please, say an example of how you want it to work.