This spell must be triggered by jumping off an object and falling at least 10 ft. to the floor.  If you wish to travel more horizontally, your long jump is doubled.  When you hit, each creature of your choice in a 30 ft. radius centered on you must make a Constitution saving throw, taking 1d12 lightning damage + 1d12 thunder damage on a failure, or half as much on a success.  On a failed save, they are also stunned until your next turn.  After landing, you can move your speed.  Any attacks made this same turn deal lightning damage instead of their normal damage.

At Higher Levels.  When you cast this spell with a spell slot of 2nd level or higher, each type of damage increases by 1d12 per level.  If you cast this spell with a 5th-level slot, it instead deals 60 lightning and 60 thunder damage on a failed save, or 30 each on a success.