Cursed Vigilant Helm

This ancient helm, adorned with the insignia of a long-forgotten kingdom, grants the wearer enhanced vigilance over their surroundings. While wearing the Cursed Vigilant Helm, you have advantage on Wisdom (Perception) checks, and you cannot be surprised. Additionally, once per long rest, you can activate its Dreadful Glare property, forcing one creature within 30 feet to make a DC 15 Wisdom saving throw or become frightened until the end of their next turn. If the creature fails by 5 or more, they also take 1d6 psychic damage as the helm's magic inflicts their own fear back upon them. The helm, however, carries a dark curse; when attuned, the wearer becomes haunted by visions of the past, imposing disadvantage on saving throws against being frightened themselves.