Amulet of Elemental Evolution

While attuned to this Amulet, at the end of a long rest you may select either Fire, Cold, Poison, Acid, or Lightning. Until your next long rest, whenever you make an attack with your natural weapons or with an unarmed strike, you deal an extra 1d4 damage of the chosen element. 

Notes: by a druid or barbarian, Damage, Combat, Necklace, Jewelry