Makes the wearer immune to being charmed and frightened.  Allies within 10 feet of the wearer have advantage on saving throws for being charmed or frightened.  If the player is not good aligned, this is a cursed item and the wearer automatically fails checks when being charmed or frightened.

"For the protection of my people, I sacrifice my heart and bind my essence," the elf Elara whispers, her words carrying the weight of an ancient vow. With a swift motion, she plunges the dagger into her chest. Bright light envelops her, and her heart is extracted, now shrunken and withered in her hand. She hangs it on a strip of black leather, her life force ebbing away.

As she falls to her knees, the ground around the pedestal begins to pulse with a dark energy. Her voice, now a faint whisper, "This amulet will guard against the charms of those who would do us harm, but know this: its power comes with a price. Only the worthy may wield it without succumbing to its curse."

Notes: Immunity: Charmed, Immunity: Frightened