Crown Knight

Trained within the city guard of Rexxentrum and their techniques honed through assistance of the Cerberus Assembly, Crown Knights are fighters trained to protect the monarch of the city. They have various arcane abilities that allow them to quickly teleport to where they need to go and defend themselves and allies from magic. A Crown Knight does not have to be a Crownsguard of the Dwendalian Empire, but most likely learned their skills from the group. You could be a renegade member on the run, or have simply found tomes in old libraries that taught you the techniques.

Weave Shift

Beginning at 3rd level, you can quickly teleport to a creature you need to keep in place. When you hit a creature with a weapon attack, you can use your bonus action to teleport within 5 feet of the creature. You can do this a number of times equal to your proficiency bonus, and regain all uses of the feature when you finish a long rest.

Arcane Guardian

Starting at 7th level, you can shield you and your allies from magic. When you or an ally within 30 feet of you fails a saving throw from a spell or other magical effect, you can use your reaction to let that creature reroll the saving throw. They must use the new roll.

Shifting Warrior

At 10th level, you can attack much more swiftly while shifting, your form flickering and attacking faster. Firstly, when you use Weave Shift, you can make a single weapon attack against the creature that you hit after teleporting within 5 feet of them, still part of the same bonus action. You gain a bonus to the damage roll of this attack equal to your proficiency bonus.

Additionally, if you've only used half of your base movement speed on your turn, at the end of your turn you can take the Dodge action with no action required.

Mage Hunter

When you reach 15th level, you become adept at finding magical sources and taking them down. As an action, you can open your awareness to magical happenings around you. For the next minute, you know the location of anywhere that a spell has been casted in the last 24 hours, what spell was casted, and by what, 30 feet around you. You instantly gain a full image of the creature or object that casted the spell, and a small vision of what direction it went after casting the spell.

If you use this feature and find a spell casted by a creature or object that you've detected before, you gain full knowledge of everywhere it went between the time of casting of both of the spells. This gives you visions too, allowing you to understand scenery, interacted with creatures, and anything else that happened on the way. Nondetection or other magic doesn't hide anything from this feature.

You can use this feature a number of times equal to your Intelligence modifier (minimum of 1), and regain all uses at the end of a long rest.

Bursting Shift

Finally, at 18th level, when you teleport you let out a flurry of attacks. When you make your free attack after using Weave Shift, you can also choose to make the same attack with the same bonus against up to 3 additional targets within range of the weapon you're using to attack. If it is with a thrown weapon, it returns to your hand immediately after each attack.