Amber Orb of Dragonkind

An orb is an etched crystal globe about 10 inches in diameter. When used, it grows to about 15 inches in diameter, and mist swirls inside it.

While attuned to an orb, you can use an action to peer into the orb's depths and speak its command word. You must then make a DC 15 Charisma check. On a successful check, you control the orb for as long as you remain attuned to it. On a failed check, you become charmed by the orb for as long as you remain attuned to it.

While you are charmed by the orb, you can't voluntarily end your attunement to it, and the orb casts suggestion on you at will (save DC 18), urging you to work toward the evil ends it desires. The dragon essence within the orb might want many things: the GM decides.

Spells 

The orb has 7 charges and regains 1d4 + 3 expended charges daily at dawn. If you control the orb, you can use an action and expend 1 or more charges to cast one of the following spells (save DC 18) from it: Spirit Guardians ( 4 charges), Produce Flame or Flame Strike (3 charges). the orb can expend 2 charges to activate: flaming fists which make unarmed strikes deal an additional 1d8 fire damage for one minute.

Call Dragons

While you control the orb, you can use an action to cause the artifact to issue a telepathic call that extends in all directions for 40 miles. dragons in range feel compelled to come to the orb as soon as possible by the most direct route for the next hour. Dragons drawn to the orb might be hostile toward you for compelling them against their will. Once you have used this property, it can't be used again for 1 hour.

Notes: Immunity: Fire, Resistance: Radiant, Summoning, Control, Scrying