Charm of Biting Cold

D&D 2014 boon: Charm of Biting Cold. Source: Icewind Dale: Rime of the Frostmaiden. boon type Charm This charm can be bestowed by a This charm has 3 charges. As a bonus action, you can expend 1 of the charm's charges to wreathe your weapon attacks with biting cold for 1 minute. Until this effect ends, you deal an extra 1d6 cold damage when you hit with a melee or ranged weapon attack. Once all its charges have been expended, this charm vanishes from you.

Source: Icewind Dale: Rime of the Frostmaiden, p. 283 - Licenses and attribution