The visibility of Mage armor has always been a hot debate among players, but many agree that it is not about whether you should see it or not instead, it’s a personal choice or the DM’s ruling. When the character is hit, a flash of arcane energy bursts out from that point, illuminating the armor and making it visible for a moment”. “I like to describe it as an armor of glowing arcane runes and lines spreading over the caster and then turning invisible. It is best be described by a user who said, Most of the time, players like to leave the appearance to the DM, but those who choose it themselves can discuss it with the DM. The appearance of the Mage armor entirely depends on either the DM or the player. It is a pretty hefty defense armor that gives the player who is wearing it an ultimate defense but provides nothing when it comes to attacks of any sort. It’s a level 1 spell that lasts 8 hours and has components V, S, M. It gives a protective shield to whoever we wish to save and gives it an opportunity to survive. An essential thing to remember is that it gives an increase in base armor by 13 and a dexterity bonus, and you cannot cast it if you’re wearing the armor yourself. It’s a pretty simple spell whose conditions to cast are specified by the game when you cast it. If the person who casts it decides to break it, it can be broken. The duration of the spell is at most 8 hours.

It can only be cast when the user touches the creature giving it a protective layer for battle and defense.

Mage armor 5e D&D is a type of protective spell that surrounds the person/creature with armor when cast upon by the user.

Avatar the last airbender armor