Amulet of Elemental Balance

This small, solid-gold amulet takes the form of two unfurled wings curving upward from the top of a pair of balanced scales. Framed between these wings is a large teardrop-shaped cut gemstone, approximately one inch high and half an inch wide. 

While you are attuned to this amulet, as part of a long rest you may choose one of the following pairs of damage types. You gain resistance to one of these two damage types (your choice), but gain vulnerability to the other. While granting these modifiers, the colour of the stone changes in the manner noted in the list. 

• Cold and Fire (Gem swirls and fades back and forth between blood red and pale blue.)
• Necrotic and Radiant (Gem glows in a radiant purple-black, similar to a blacklight.)
• Force and Psychic (Gem is clear, but sends out prismatic rays whenever light touches it.)
• Lightning and Thunder (Gem is a swirling opaque cloud of iridescent blue. When jostled, it flashes a faint blue-white.)
• Acid and Poison (Gem is a sickly, milky green-white, with streaks of watery red.)

This effect remains until your next long rest, at which time you may select another pair of damage types, or none at all.

Notes: Damage, Buff, Debuff, Jewelry