Halberd of Gemstone Consumption

Weapon, uncommon

This halberd is crafted in the style of the ancient dwarves, with scrolled and gem-inlaid details. It has an empty socket at its pommel, which appears as though it would fit a fist-sized gemstone.

You gain +1 to attack and damage rolls. Additional benefits may be gained by slotting various gemstones into the weapon’s pommel.

With the Firelight Citrine

The blade of the weapon glows orange and produces light as a torch. Once per day, if the blade comes into contact with flame, it spews fire in a 40 foot cone. All in the cone take 3d8 fire damage, DEX save for half, after which the blade/stone won’t produce light until the next day.

With a Moonstone

The blade of the weapon glows with ghostly moonlight, producing light as a candle. Once per day, a hit creature is engulfed in ghostly flames that cause searing pain, and it must make a Constitution saving throw. It takes 2d10 radiant damage on a failed save, or half as much damage on a successful one.

(A shapechanger makes its saving throw with disadvantage. If it fails, it also instantly reverts to its original form.)