Frostbite Shard

This small, crystalline shard radiates a chilly aura, capturing the essence of the Frost Warden's domain. While holding the Frostbite Shard, you can use it to cast the Ray of Frost cantrip at will. Additionally, once per long rest, you can release a wave of freezing energy as a 15-foot cone, forcing creatures within to make a DC 13 Constitution saving throw. On a failed save, they take 2d6 cold damage and have their speed halved until the start of your next turn. On a successful save, they take half damage and are unaffected. However, the chilling aura of the shard imposes a -1 penalty on saving throws against cold damage and frost effects. Furthermore, each time you use the 15-foot cone ability, there is a 10% chance that you become unable to feel warmth for the next hour, imposing disadvantage on checks involving dexterity or stealth as you momentarily become lethargic in the cold. The Frostbite Shard is believed to be a remnant from the icy heart of the Frost Warden's domain, shaped by its will and infused with its elemental energy, both a tool for harnessing the cold and a reminder of the chilling sterility of the elemental realm.