Agony
Agony
Agony is a level 5 Necromancy spell which functions as a single-target torment, cutting the HP of any one target that you have line of effect to in half. It cannot deal lethal damage, but it can very quickly soften up powerful, uninjured targets like hydras or giants to make them more manageable. Like torment, it is worthless against demons, plants, and the undead, and its damage can be reduced with negative energy resistance - being completely negated at rN+++. While it never misses, it can be resisted with high magic resistance, although it does receive a spell power multiplier of 5.
Strategy
One of the greatest selling points of Agony is the fact that it can affect opponents at the edge of your line of sight. Hitting an enemy with it once or twice as they charge toward you makes it much easier to mop them up with whatever other attack spells you have available once they're in range. If you haven't branched into other magic schools, Pain makes a decent finishing blow, as it affects all the same creatures as Agony and only has to carve through a fraction of the HP it normally would.
Monster Version
The monster version functions the same as the player version.
The following enemies cast Agony: