Shifter

Shifters are rogues who learn to master brief spurts of multi dimensional travel. Although they may not have the magical proficiency to actually cast spells, they have learned to master the art of moving through one plane with great ease.

Shifters are masters of mobility. Not only for themselves but also for their allies, able to teleport their party to otherwise unreachable areas. Impossible to catch, they are constantly blinking in an out of existence as they jump between the material and ethereal plane. 

Rift Walk

You use your action to blink into the edge of the ethereal plane, leaving a medium sized portal where you started your turn. While in the in between world, your movement speed is doubled and you do not incur any disadvantages associated with swimming or climbing. During this time, you do not provoke any attacks of opportunity. When you end your turn, choose an unoccupied spot within five feet of your character to place the other end of the portal. 

Willing creatures may step on one portal and expend five feet of movement to move through the portal, exiting on a tile adjacent to the rift of their choosing. Creatures may take grappled targets through the portal if they choose but must make a grapple check in order to not lose their grip when moving through the portal. Objects can also be thrown through the portal and land on the tile of the exit portal.

This may be done a number of times per long rest equal to your proficiency bonus but only one set of portals can exist at one. 

Surprise Swap

You swap places with a willing creature, surprising enemies near you and opening a moment for either of your to strike. You may use your bonus action, consuming all of your remaining movement, to swap places with any willing creature within 60 ft of you. Upon doing so, the creature you swapped places with may use their reaction to make an attack of opportunity with your sneak attack. You may use this an amount of times equal to your proficiency bonus per long rest.

Misty Dodge

You have learned to instinctively blink away from danger. When you use your reaction to uncanny dodge, you may immediately cast Misty Step on yourself for free. You can also now cast Misty Step a number of times per day equal to your intelligence modifier without expending a spell slot.

Full Shift

You have mastered the ability to move through planes completely. Once per week, you may cast Plane Shift for free. Furthermore, once per long rest you may cast banishment and banish the entity to the in between realm. 

While in the in between realm, this creature ignores any benefits you gain from Rift Walk.