Help on spell sap life

Current upkeeper: Oya
Casting time    : 6
Spell cost      : 1
Spell type      : offensive (single)
Spell words     : oryu fiel si neim
Affecting stats : Int, Wis, Lvl, Masteries
Affecting skills: Arcane power, Energy focus
Affecting spells: Sap life
Many undead creatures are known for their ability to drain life from the
living. With this horrible spell a powerful necromancer can mimic that ability
and damage his enemy while becoming stronger himself.

Sacrifice < List > Satiation