Metabot's Manual of Magical Maneuvers

Phasewalk

4-level Transmutation

Once per turn before the spell ends, when you would move, you can instead teleport to a location whose distance is within half of your remaining movement for the turn, and your movement for the turn is reduced by twice the distance you traveled.
Once per turn, if you would enter a creature's space using this spell, weapon attacks you make against that creature are made at advantage, additionally, the creature must make a Dexterity saving throw or take 2d6 lightning damage.
You emit an audible hum and bright afterimage that lasts throughout the teleport movement, illuminating areas within 10 feet of your path until the start of your next turn.
At higher levels: When you cast this spell using a spell slot of 5th level or higher, the damage spell increases by 1d6 for each slot level above the 4th.