Elemental Dive

As the caster is in the air, the caster uses the spell in order to slam onto a creature equal to their remaining move speed. Once the spell is cast, the caster chooses between fire, frost, lightning, or acid in order to deal 3d6 plus whatever fall damage the caster would've taken done onto the creature being hit. Upon slamming into the ground,  there is a ten foot explosion that nearby creatures will take the damage. If the slam is successful, the hit creature must make a Dexterity saving throw, and if they succeed, half the damage of the element in effect.