Zeburon's Dread Helm

Armor Legendary [The Dread Helm is attuned by the warm blood of an adversary. The Victim's blood must splash across it to complete attunement. This blood must be from a humanoid creature.]

Advantage on intimidate checks. 1/day make an intimidate check at a target monster that you can see. The target must make a wisdom saving throw against your intimidate check. It the creature fails it becomes frightened. Save ends with the DC equal to the intimidate check.