True Blink

You quickly pull your open hand facing yourself downward while clinching into a tight fist starting at or slightly above your head.  After doing so you make a short ranged teleport up to 30 feet away to a point you can see, you can blink to and from mid air.  The action is completely silent and only leaves a small traces of dark purple particles in the air that quickly dissipate within 2.5 seconds.  If someone sees you do so they will become extremely confused and either investigate or ignore it depending on the person that witnessed it.  If you blink to a ledge you can climb the ledge instantly or hang from it.  

Combat:  If seen doing so while in combat, enemies, if you escape each one's vision, will become confused and then search for you.  If they cannot find you within 2 minutes they will stop looking for you if they were in combat against you only but will be on high alert for the next 30 minutes to an hour.  If in combat with others as well they will look for in their general line of sight for 1 round and then switch to attacking someone else.  If one enemy that is in combat sees where you blink to they will notify the others that were in combat after being surprised.  Large and powerful enemies are surprised by your blink, but are still confused.  

You can preform assassinate in combat but blinking away will require an action and if against a large or powerful enemy will not do the double damage, and initiating a choke from the front causes a -2 to strength check and gives no advantage if from a blind spot, if they are secluded and do not know you are there you have the effects of being outside of combat.

Outside of Combat:  If an enemy witnesses you blink you roll a stealth check with a +2 bonus vs their passive perception with disadvantage.  Blinking to someone will surprise them and allow you to preform one of three actions:

Assassinate:  If the target has any opening on their armor or weakness on their body, they will be instantly killed and allow you to blink away without using an action or entering combat.  Assassinate will not instantly kill large or powerful enemies and will instead do double damage.  Non-powerful enemies will have to roll an intelligence saving throw DC 16, on a fail they are frightened.  If someone else witnesses you assassinate someone they may run in fear and get help or instantly run over to the area to investigate depending on the person.  

Choke:  You can blink up to a target and put them into a choke hold and try to incapacitate them, rendering them unconscious after two turns.  Their struggle can only be heard for up to 10 feet away and any enemy that is within that range must beat a perception check thats difficulty increases the farther away they are.  The struggle cannot be heard through walls thicker than 2 inches.  If you initiate the choke from any blind spot you gain advantage, if you initiate from the front you have disadvantage.

Silence:  You blink to someone and put your hand over their mouth and signal them to be quiet.  You roll an intimidation check against enemies, and a persuasion check against neutral people.  If you do this to an ally you both go prone and roll a stealth check with advantage.