Boon to the Bronzen Sentinel(Ichoriite)(Imbued Crystal)

You have a magical crystal embedded in your head or chest. When you take this feat, choose Intelligence, Wisdom, or Charisma, and choose cold, fre, or lightning damage. As an action, you can make a ranged spell attack with the crystal, up to 120 feet.

Your attack bonus is your profciency bonus plus the chosen ability modifer. On a hit, you deal 1d10 damage of the chosen type. Tis attack’s damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).

From Esper's Emporium Of Esoterica