A necklace with a shimmering wyvern scale attached as a pendant.

While attuned to this necklace, you have resistance to poison damage and are immune to the poisoned condition

Additionally, when forced to make a saving throw against a spell, you may grant yourself advantage on the saving throw. You may use this effect once and then must complete a Long Rest to regain it's use.

Notes: Resistance: Poison, Immunity: Poisoned, wearing the necklace for 1 hour