Frost Breath (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Range:||Self (15-foot cone)|
As you hold your hands with thumbs touching and fingers spread then blow outward through the gap between your hands, a sheet of shimmering, impossibly cold mist and ice crystals shoots forth from the gap in front of your mouth. Each creature in a 15-foot cone must make a Constitution saving throw. A creature takes 4d6 cold damage on a failed save, or half of 2d6 cold damage on a successful one. The damage inflicted by this spell on a failed save is considered to be critical damage, and features and traits that trigger on critical hits can trigger on creatures that fail their saving throw against this spell, however this spell's damage on a failed save cannot be made critical by any features or traits that would otherwise cause it to be, as it is already considered to be critical damage.
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage on a failed save increases by 2d6 and the damage roll on a successful save increases by 1d6 for each slot level above 1st.