Cragore's Lightning Step

   Instantly travel up to 40 feet in a straight line to a location you can see, make an attack roll against each opponent you pass through along a 10 foot line, deal weapon damage to each target hit plus a pool for 4d6 divided between targets as chosen by the caster.

When you cast this spell using a spell slot of 4th or higher, increase the lightning damage pool by 2d6 per spell level