The following is what you can obtain free Soul Leaf from Master / Apprentice Sys.
Remember: you need to keep a least 1 apprentice to see this window, otherwise the window will be a different one
ps. Other method of obtain Soul Leaf is may drop Soul Leaf Pack by boss in certain instance.
Below the "Soul Leaf" that "Experiece" i suggested not to use, coz it cost too much Mentor point which is very not worth.
Thos Mentor point can be save for a Mount Combat Licence 2 is way much worthy.