Elemental Arrow

When you cast this spell, choose one: Air, Earth, Fire, or Water.  The next time you hit a creature with a ranged weapon attack before the spell ends, this spell creates an elemental blast of energy.  In addition to the normal effect of the attack, the target also suffers one of the following effects, based on the element you chose.

• Air.  The target must make a Strength saving throw.  The target takes an additional 2d6 thunder damage and is pushed back 10 feet away from you in a straight line on a failed save, or half as much damage without being pushed on a successful one.
• Earth.  The target must make a Strength saving throw.  The target takes an additional 2d6 bludgeoning damage and is knocked prone on a failed save, or half as much damage and isn't knocked prone on a successful one.
• Fire.  The target and each creature within 5 feet of it must make a Dexterity saving throw.  A creature takes 2d6 fire damage on a failed save, or half as much on a successful one.
• Water.  The target must make a Constitution saving throw.  The target takes an additional 2d6 cold damage and has its movement speed reduced by 15 feet until the start of your next turn on a failed save, or it takes half as much damage and suffers no movement reduction on a successful one.

At Higher Levels.  When you cast this spell using a spell slot of 2nd level or higher, the damage of the attack increases by 1d6 for each slot level above 1st.