One spell that has many uses, is the spell that is able to dispel any
magical protections imbued on a target. Offensively, removing the
protections cast on your foe, leaves him open to many different attacks
that those protections may have otherwise thwarted. Defensively, it is
useful to removing protections that are about to dissipate in order to
cast fresh spells upon the target. Everyone knows that any protection that
falls during combat, could be a vital turn in the battle indeed. While
this spell doesn't affect all protection spells, a great deal are
completely removed.