Amulet of Quandary

An amulet that gives the wearer an option to choose 1 of the 2 contrasting abilities when concentrated upon. 

As an action, wearer can use the single charge to cast damage or healing.
If damage is chosen, all creature within the 50ft radius of the wearer will take (Character level) x d10 necrotic damage.
If healing is chosen, all creature within the 50ft radius of the wearer will receive (Character level) x d10 hit points.

Notes: Damage: Necrotic, Protection: 0 HP