Wizard's Fury is a destruction spell. This spell does Fire damage over time while inflicting Shock and Frost damage on target. Duration and damage depends on your character level when you finish the quest for this spell. At the most powerful form of the spell, which is at level 30 or more, it does 10 points Fire damage for 15 seconds and Frost and Shock damage on target for 30 points each. This is given to you as a reward by Raminus Polus for completing A Plot Revealed, and is one of the only 3 leveled spells in the game.
With Destruction Magic 100, this spell only costs 47 Magicka, which is much less than making this spell yourself. When you would copy this spell at an altar of spellmaking this spell would cost 93 Magicka.