Blinktheif

Most people are limited by having to walk and move around in the material plane, but not all people.
Blinkthieves is a term that has been used to describe these incredible rogues who have the strange
ability to vanish in and out of the ethereal plane seemingly instantly. Rumor has it that they are all part
of a secret organization that teaches them this magic, others claim that they are creatures from the
ethereal plane here to haunt the material world. The truth remains unknown to this day.
Nonetheless, this ability gives them a real one up on anyone who underestimates it and there is no
thief that is harder to catch than a blinkthief.

Source: The living world of Ismaroth.

Ethereal Stride

At 3rd level, you gain the ability to hop in and out of the ethereal plane within seconds. As a bonus
action, you can enter the ethereal plane until the start of your next turn. You can choose to exit the
ethereal plane as a bonus action on your turn and you automatically exit it if you target a creature with
an attack roll or cast a spell. When you exit the ethereal plane by targeting a creature, the attack counts
as a sneak attack if it hits.
You can use this feature a number of times equal to your Intelligence modifier and you regain all
expended uses of it when you finish a short or long rest.

Burglar’s Plane

At 3rd level, you can store small objects weighing up to 30 lb. in a small extradimensional space. There is no specific limit to the number of items that can be stored in this space. Additionally, you can change the size of objects that can be stored in the extradimensional space, or institute a limit to the storage size.

Demensional Crawlspace

At 9th level, you have gained the ability to manipulate planes into creating your own crawlspaces in
existence. You can spend 30 seconds concentrating to open a gate to your own pocket dimension. The
dimension can be no larger than 20 cubic ft. The dimension lasts for an amount of hours equal to twice
your Intelligence modifier or until you dispel it. If there are any creatures inside the pocket dimension
when it fades, they are expelled into the open spaces nearest the entrance.
You can use this feature a number of times equal to your Intelligence modifier and you regain all
expended uses of it when you finish a long rest.

Shifting Ghost

Starting at 13th level, while you are on the ethereal plane, you can interact with the material plane as if
you were on it. Additionally, when you exit your ethereal stride, you can use a reaction to use the feature
again.

Planar Entombment

At 17th level, your understanding of the planes of existence has increased and you can now force people
to into them. As an action you can cast the Plane Shift spell on one targeted creature.