Oblivion:Frenzy

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	Frenzy
School		Illusion
Type		Offensive (Non-hostile)
Effect ID		FRNZ
Base Cost		0.04
Barter Factor		0
Availability (Click on any item for details)
Spells Scrolls Arrows

Frenzy up to level L for D seconds

Increases the target NPC's Aggression (i.e., its inclination to attack). Afflicted targets will generally be unable to distinguish friend from foe, and will attack anyone in their way. Undead and Daedra are not affected. Casting this spell on someone is not considered to be an assault.

For calculating magicka costs of this spell, the level needs to be converted into a magnitude, see Magnitude to Level Conversion. One implication is that the enemy levels affected by any Frenzy spell will be less than the quoted values if your Spell Effectiveness is less than 100%.

[edit] Notes

If you cast Frenzy on a spellcaster with an active Summon spell, you may be able to make the summoner turn on his creature.
This spell is especially effective in dungeons or areas with lots of NPC enemies if you have an invisibility spell or potions. Cast Frenzy on one or more enemies, turn invisible, and they will most likely fight to the death.
Be careful when targeting people with Frenzy inside towns as this may result in the death of NPCs you may find you later need for quests or trading.
It can be fun to create a maximum magnitude Frenzy spell, combined with a Rally spell, within a large area to cast in a populated area. Save before doing so, as the following destruction is likely to be immense. Try this at the Arcane University, and you will find the Scholars and Apprentices in a constant battle with the Imperial Legion Battlemages.
Since guards are constantly ten levels higher than the player, a high magnitude Frenzy spell and 100% Spell Effectiveness are necessary to affect them.