"Their leader was cutting through my troops with his glowing sword. He was so laden with enchantments that we couldn't touch him. And then my necromancer finally joined the fray."Mass Cancellation is a third-level death magic spell in Heroes of Might and Magic IV that costs five spell points and removes all beneficial spells and effects from all enemies in battle.
All illusions fade, all immortality potions expire, and every ward and blessing is stripped away. Levelling the playing field never felt so good. Even better, your own dark handiwork is not undone - all curses and negative effects remain to plague your foes (and your own units, so remember to do unto others before they can do unto you!)