withdrawling a skill question

[FOTTI]

if you go to the herblist and click withdrawl skill, does this make.. i.e your lvl 30fire mastery go to 0?

[ZaKnighT]

look when you accept that quest you go kill moobs.. drop cursed hearts. for every 10 you get 1 potion. 1 potion can dlvl 1 skill. so lets say you have 30 lvl's mastery added. but noo skills you need 30 potions.

[roma007]

and you only get 80% of sp back (you get 100% back if you buy from item mall)

[Gladiator_RN]

Yup.