Ebon Skull

This sinister, black Humanoid skull, bearing glinting rubies in its eye sockets, is a potent magic item. While attuned to this magic item you gain the following benefits.

• As a Magic Action, you can cast the animate dead spell. Once you cast this spell three times, you can't cast it again until you finish a Long Rest.

• You gain Darkvision 120 feet.

• You have Resistance to Cold and Necrotic damage.

• As a Magic Action, you can create a 20-foot radius Sphere centered on a point within 60 feet of you. The Sphere is composed of a chilling black mist. Each creature in the Sphere must make a DC 17 Constitution saving throw, taking 2d10 Cold damage and 2d10 Necrotic damage on a failed save, or half as much damage on a successful one.

• A creature must make this saving throw when the Sphere moves into its space and when it enters the Sphere or ends its turn there. A creature makes this save only once per turn. On each of your subsequent turns, you can use a Magic Action to move the Sphere up to 30 feet. The Sphere lasts for 1 minute or earlier if you dismiss it as a Bonus Action. Once you use this property, you can't use it again until you finish a Long Rest.