Spell Immunity (Abjuration)
Level: Priest 4, Protection 4, Abjurer 4
Mana: Variable. Base Success: 95%.
  Casting this spell grant you complete and permanent immunity to a single spell of your choice of a level lower than or equal to 6. This costs you a number of points of mana equal to ([(Spell Level + 1) / 2] x 5) permanently.