Item: Half-Mask of the Imp, granting the wearer some of the abilities of a minor fiend:

  • Devil’s Sight. Magical darkness doesn’t impede the wearer’s darkvision.
  • Magic Resistance. The wearer has advantage on saving throws against spells and other magical effects.
  • Damage Resistance to bludgeoning, piercing, and slashing from nonmagical attacks that aren’t silvered
  • Horns: +7 on Headbutt attacks

Item: Eyes of Doom: These smoked crystal lenses fit over the user’s eyes, enabling him to cast doom upon those around him (one target per round) as a gaze attack, except that the wearer must take a standard action, and those merely looking at the wearer are not affected. Those failing a DC 11 Will save are affected as by the doom spell. (image source; item source)