I is for Ice Wine

"I picked up a bottle of this Jotunheim. It's really sweet makes a great dessert. I've also heard of certain alchemists that have created bottles of the stuff that will let you breath like a white dragon."

-Cade Ashworthy

Ice Wine

 

Ice wine is created from grapes still frozen on the vine. This makes it a concentrated sweet wine. It's not particularly expensive, though it can be in areas that are always warm.

Being a regular wine, the Constitution saving throw to avoid getting drunk on ice wine is DC 10.

Jotun's Breath

Potion, uncommon

After drinking this wine, you can use a bonus action to exhale subzero breath at a target within 30 feet of you. The target must make a DC 13 dexterity saving throw, taking 3d6 cold damage and gain the restrained condition on a failed save, or half as much damage on a successful one. The effect ends after you exhale the cold three times or when 1 hour has passed. 

This bottle of wine always feels cold to the touch.