Amulet of Nekhtou

This two inch amulet is oddly warm to the touch. Its exquisitely forged from gold, platinum and electrum into the shape of a locust and hangs from a chain made from the same materials.

Using an action you can cast the Insect Plague spell (save DC 15) by throwing the amulet into the sky, where it will explode into a swarm of locusts. The amulet will reform around the throwers neck at dawn of the next day. 

Notes: Jewelry