In d&d, how does mage armor 5e work? What does mage armor look like? And does mage armor apply when polymorphed?
Mage armor 5e spell
Level: 1st
Classes: Wizard, Sorcerer
Casting Time: Action
Range: Touch
Components: V, S, M
Duration: 8 hours
How does dnd 5e mage armor work?
You touch a voluntary creature without armor and surround it with a protective magic field until the d&d 5e mage armor spell ends. The target’s base AC becomes 13 + its agility adjustment value.
After the target wears armor or you dissolve the mage armor spell in one action, the spell ends.

Check out:
Frequently topics Mage armor
1. DnD tips: Plot Armor is more effectively than d&d 5e Mage Armor but requires a 3rd level spell slot, so it’s important to ask yourself, “How important IS it for my character to survive this?”
2. As a sorcerer dnd 5e, which is better mage armor or shield?
3. Then, at level 2, take the Armor of Shadow’s eldritch invocation. Ditch the chain shirt.
Also, I just noticed the example w/the chain shirt is incorrect because the dex bonus add is maxed 2. Still, at level 2, w/mage armor, you can get 18 AC on spells and range, and 20 melees.
4. Very strong for a cantrip, especially if there are no restrictions on armored/unarmored like the dnd 5e Mage Armor. Plus, it would stack!