Blessing of Rime

You summon a chill wind that snuffs out flames and numbs the pain of your allies. When you cast the spell, any non-magical flames of your choice within range are extinguished. Choose up to three creatures within range. Each gains 3d8 temporary hit points for the duration. While a creature has these hit points, if it makes a Constitution saving throw, it may choose to have advantage on the roll. If it does, after the roll has taken effect, they lose any remaining temporary hit points from this spell.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 3.