A block that works perfectly, is this :MG_ENERGYCOAT#Energy_Coat#
ABV_STATUS#Skill name, ignoring _#
I don't understand.useSelf_skill Energy Coat {
lvl 1
sp > 10% #Active only when your sp is greather or equal than 10%. Verify this.
whenStatusInactive Energy Coast
}
Where are you pasting this block ?
Verify if you are copying the two brackes, on begin and end.
Try this :
Create an notepad archive in your control folder and put your name : useSelf_skill
Now, paste this block there.
Open your config and put : !include useSelf_skill.txt
On begin of your config.txt lines.
On openkore start, see if kore is loading this archive.

Type "skills".