The Health stealing skill is a class magic skill. The magic skill determines what spells you can learn from the Health stealing line of magic.
No playable classes get this skill but a number of monster classes do.
There are generally two categories of magic spells:
Spells in this magic line fall into the combat castable category as it contains a number of health drain spells.
To learn more spells you need to find spell scrolls or visit a Health stealing draining spell trainer who can teach you more spells.
Casting a drain spell
You can cast such spells in combat in two different ways.
To cast a readied spell you must have first readied the spell, to do this go to the Abilities > Ready Spells screen and choose the spells you wish to ready.
To cast any spell in combat you need two main things:
After casting a spell you will gain a purple skill gain.