Archwizard's Ensemble

This elegant outfit is made from exquisite cloth of any color and is adorned with silvery runes and stars. The outfit's star colors corresponds to the alignment of the wearer. Gold stars on the robe means good, silver for neutral, and black for evil. You gain these benefits while wearing the outfit and attuned:

• Spellweave. If you aren't wearing armor, your base Armor Class is 15 + your Intelligence modifier. You have advantage on saving throws against spells and other magical effects.
• Absolute Focus. You are able to focus on two concentration spells at once. When you take damage which causes you to make a Constitution save to maintain concentration, you gain a bonus to that save equal to your Intelligence modifier.
• Phantom Veil. While you wear the robe, you can use an Action to enter the Astral Plane along with everything you are wearing and carrying. You remain there until you use an Action to return to the plane you were on. You reappear in the last space you occupied, or if that space is occupied, the nearest unoccupied space. In addition, you can cast Etherealness, once per long rest. This does not use up a spell slot, and counts as always prepared. 
• Aurora Veil. This mantle has 3 charges, and it regains all expended charges daily at dawn. While you wear it, you can use an action and expend 1 charge to cause the garment to display a shifting pattern of dazzling hues until the end of your next turn. During this time, the robe sheds bright light in a 30-foot radius and dim light for an additional 30 feet. Creatures that can see you have disadvantage on attack rolls against you. In addition, any creature in the bright light that can see you when the robe's power is activated must succeed on a Intelligence saving throw against your spell save DC or become stunned until the effect ends.
  

  ---

  This magic outfit was commissioned by Cameron the Clairvoyant, utilizing the best arcane seamstress' the multiverse had to offer. He imbued potent and powerful sorcerous gifts into it, sacrificing other equally powerful magic items in the process. It was all worth it in the end. 
  
  This magic item was created by the magi of wonder and whimsy; Cameron the Clairvoyant. He loved to create, and was inspired by many things around him - people, places, things, concepts, nature, anime, pop culture - and loved to craft superior unique things for the Dungeons and Dragons community. Check out his homebrew creations in every category on D&DBeyond, and feel free to incorporate them into your homebrew campaigns. Cameron the Clairvoyant is a former player-character that reached level 20 and now functions as a NPC Archwizard, and has created numerous impactful magic items, weapons, subclasses, monsters, creatures, feats and spells. Seek him out in your next quest! He loves to take requests and interact with parties of player-adventurers.

Notes: Set: Unarmored Armor Class, Advantage: Saving Throws, Resistance: Damage from Spells, Wizard only, Buff, Warding, Outerwear