Skill to heal sp and takes away hp.

Hey guys was just wondering if anyone knows of away to make a skill that heals your SP but takes away a little bit HP im new to skill making so if anyone can show me how to do it thanks  

really easy, make a skill, make it so it doesn't do anything , doesn't target any1.
make 1 of those skills for every hero you have or will have in your party that might use it.
for each of those skills make a common event and do -hp and +sp stat change inside the common event damaging and healing the respective user of the skill

and then of course link the skills to the common events.

Sounds good i will try it out thanks  

hey, can you make something like that, only it takes 100% of your SP to cast?

Not sure that would be cool for like an ultimate attack.

Btw what you told me to do worked thanks =)

Yeah, thats what i wasw thinking... i was gunna have one of my members like go ballistic during a battle and cast this god almighty spell, but it drains her SP... so i wanted to know if it was possible to change to percentage for damage