A chest shaped object with the power to instill terror.
It is shaped like a small chest, with golden handles and a black body.
The well of nightmares can change size to accommodate the user. However, its primary ability is that to generate a Phobia Field. Within this field, the victim's greatest fear is realized. When used against multiple people, the strongest mind's fear is realized, or the closest.
What makes it so dangerous is that the field, can and often does encompass entire planets.