Help on spell mana drain

Current upkeeper: Argail
Casting time    : 5
Spell cost      : 500
Spell type      : offensive (single)
Spell words     : magi xi tar zi!
Affecting stats : Int, Wis, Lvl
Affecting skills: Arcane power, Energy focus
Affecting spells: Mana drain
With this spell one can drain mana from target creature.

Malice of waren < List > Mana shield