Absorbing Aura

A shroud of small twinkling lights surround you. When a creature makes an attack roll against you with this spell cast, (do not roll to save Concentration for this attack, it's automatically saved) you take the appropriate amount of damage, then absorb the damage type's energy, changing the lights to rings of a damage type energy around your waist and hands (if Fire damage, rings of fire. If Slashing, tiny blades surround you, etc). You can hold this damage around you for as long as the spell lasts (when taking damage, you must roll for Concentration again). You can send a ball of this energy towards an opponent in sight and within 35 ft, making them roll a Dex. Saving Throw. If failed, they take 2d6 (absorbed damage type) damage.