Assassin's Step

You open a portal between two darkened areas within 60 feet of you. If you start your turn in an area of dim light or darkness while concentrating on this spell, you can open a portal to another area of dim light or darkness within range and transport yourself to that spot. Doing this uses up your movement for the turn, regardless of the distance traveled. The portal closes at the end of the round. You can use this ability while prone. Moving in this manner does not draw opportunity attacks.