"You stop at a tavern for a quick drink, but when you leave you find an odd-looking helm that could only be a Mind Shield in the stable where you left your horse. Beneath the Mind Shield is a note saying, "Sorry, needed a horse badly. Hope this is enough payment." You would be more upset losing a horse, except that you found that one this morning and only rode it to this tavern to give your normal steed a break."
—Mind Shield
Mind Shield is an artifact from Heroes of Might and Magic IV that protects the units in a hero's army, making them immune to Mind spells. Note that this can include beneficial spells, such as Precision.