A fiery bolt launches from your fingertips towards a point you choose within range. It then erupts in an intense explosion of heat and flame. Each creature in a 20-foot radius takes 8d8 fire damage or half that damage with a successful Dexterity saving throw. If a creature fails the Dexterity saving throw, it must also make a Constitution saving throw, or the flame leeches the vitality and moisture from its body. An affected creature gains one level of exhaustion and takes a 1d4 penalty on Strength checks until they finish a short rest. Desiccating fireball is especially devastating to creatures wholly composed of water or similar liquids such as water elementals. These creatures have vulnerability to the fire damage inflicted by this spell unless they are immune to fire.