Frost Hammer (5e Equipment)

Weapon (any hammer), very rare (requires attunement)

You gain a +2 bonus to attack and damage rolls made with this magic weapon, which deals an additional 1d6 cold damage and 1d6 necrotic damage on a hit. In addition, while you hold the weapon, you have resistance to cold damage. The weapon has the thrown property with a normal range of 30 feet and a long range of 60 feet. Immediately after the attack, the weapon flies back to your hand.
This weapon has 4 charges and regains 1d4 expended charges daily at dawn. As an action, you can expend 1 charge to cast Rime's binding ice, or 2 charges to cast freezing sphere.