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I try not to rely on chaos and a lucky sorcerer when playing against Necropolis. The chances of success with spells are reduced for the warlock by the banshee's scream. And if there's a Dread Knight and they also trigger a deadly misfortune, plus they have the right artifacts and skills, the warlock with chaos will completely fail.
Doesn't the luck of the hero decrease from the abilities mentioned above?
I think it only affects the units.