You learn the Frostbite cantrip. It counts as a warlock cantrip for you, but it doesn't count against your number of cantrips known. You find healing potency in your magic. Choose a willing creature and it receives healing equal to twiceFrostbite's damage. The creature will need to make the CON DC or will have Frostbite'sdisadvantage effect. A creature that makes a failed save cannot be healed by this cantrip until they finish a long rest.