Arctic Focus

This fragment of elemental ice can act as a focus for your Ki. This shard has 5 charges and regains 1d4+1 charges each dawn. While attuned to this item, whenever you land an unarmed strike using your flurry of blows feature you can expand 1 charge to add 1d8 cold damage to the damage roll. You can also, as an action, expend 3 charges to cast Armor of Agathys on yourself at 2nd level.

Notes: By a Monk