Chromatic Breath Weapon

You exhale draconic energy upon the battle field. choose one of the following options:

Acid Breath. You exhale acid in a 60ft line that is 5 feet wide. Each creature within that line must make a Dexterity saving throw, taking 6d8 acid on a failed save, or half as much damage on a successful save.

Cold Breath. You exhale shards of ice in a 30 foot cone. Each creature within range must make a Constitution saving through or take 4d8 cold damage and have their speed reduced by 10 feet, on a successful save they take half damage and aren't slowed. All creatures in range take 2d6 piercing damage.

Fire Breath. You exhale flames in a 30 foot cone. Each creature within range must make a dexterity saving throw or take 4d8 fire damage and is set ablaze taking an additional 4d4 fire damage on each subsequent turn until the save is made or an action is used to douse the fire, on a successful save the target only takes half damage and does not take the damage on subsequent turns. 

lightning breath. You exhale lightning in a 60ft line that is 5ft wide and a thunder shock in a 10 foot cone. each target in range of the lightning must make a dexterity saving throw or take 3d8 lightning damage, half on a successful save. each target in range of the thunder shock must make a Constitution saving through or take 3d4 thunder damage and be deafened until the end of your next turn, taking half as much damage on a successful save and not being deafened.

poison breath. You exhale poisonous gas in a 30 foot cone. each creature in the range must make a Constitution saving throw, taking 5d8 poison damage and will be poisoned on a failed save, or half as much damage without the poisoned affect on a success.

using this spell with spell slots 5 or higher adds 1d8 of the chosen damage per spell slot level.