Magic schools in Heroes 5.

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Spell Name	Mana Points	Spell Effect and Features.
Weakness	4	The spell reduces the maximum damage of a unit.
Slow	4	By reducing the "Initiative" of an enemy unit, it makes it act less frequently.
Destructive Ray	5	The spell destroys the armor of the target enemy unit, reducing its defense. The spell can be cast on the same unit multiple times, but the defense of the latter cannot be less than zero.
Plague	6	The spell inflicts plague on an enemy unit. Creatures take damage each time they perform any action. The spell does not affect undead, elementals, and mechanical creatures.
Weakness	5	The spell weakens enemy creatures, reducing their "Attack".
Confusion	7	The spell makes a unit of creatures forget what they are doing on the battlefield. Some of the creatures will forget to shoot or retaliate. The spell does not affect undead, elementals, and mechanical creatures.
Battle Frenzy	8	Causes a unit of creatures to experience battle frenzy. Such a unit considers all other creatures and all war machines to be its personal enemies and attacks the nearest enemy with double the fury. The spell does not affect undead, elementals, and mechanical creatures.
Blind	9	Blinds the selected enemy so that it cannot move, attack, or use any skills. Blindness disappears as soon as the creature is attacked. The duration is determined by "Magic". The spell does not affect undead, elementals, and mechanical creatures.
Dominate	12	Temporarily allows the hero to control an enemy unit. The spell does not affect undead, elementals, and mechanics. The unit under the influence of this spell cannot counterattack. Dominate disappears as soon as the creature is attacked.
Unholy Word	9	Affects all creatures that do not belong to the Inferno and Necropolis factions.