Miregroth's Cursed Pendant

This pendant is shaped like a twisted, blackened thorn entwined with a crimson gem. While wearing this pendant, you gain a +1 bonus to saving throws against being frightened or charmed. Additionally, once per long rest, you can use an action to unleash a wave of malevolent energy. All creatures within 10 feet of you must make a DC 13 Wisdom saving throw or take 2d6 psychic damage and become frightened until the end of their next turn. However, while attuned to this pendant, you have disadvantage on saving throws against necromancy spells.