The creature who doesn’t wear armor, protective magical force surrounds it until the top of the spell which creature is often called a willing creature so you want to touch that creature. The target base AC will come once you add 13 to its dexterity modifier. to finish the spell you’ve got to dismiss the spell as an action otherwise it’ll end itself when the target dons armor.
Actually, the unarmored defense can’t work with the mage armor but you would possibly are asked yourself that “why don’t they work together? the mage armor specifies “it works on a creature those that aren’t wearing the armor.”
Mage Armor 5E
- Casting Time: 1 action
- Range: Touch
- Components: V S M (A piece of cured leather)
- Duration: 8 hours
- Classes: Sorcerer, Wizard
Any quite character those that are proficient with the precise sort of the armor can cast the spells whenever wearing that sort of armor with none penalty. There are numerous better ways for the mages for getting an honest armor class.
For instance: Draconic Sorcerers will get the permanent mage armor for free of charge of cost at the first level and provides 13+ Dexterity modifier AC. You touch a willing creature, and that they are protected by overlapping plates of rigid magical force. That creature has an AC of 16 until they don armor, the spell ends, you dismiss it, or it’s successfully dispelled. As of this point, the character sheet doesn’t affect “real-time” status effects, like casting a spell and it affecting abilities/AC/HP automatically. this might change within the future.
Per this 2016 Sage Advice, a player can wield a shield and use Mage Armor. However, the +2 bonus from a shield wouldn’t stack with the Mage Armor. The way I interpret it’s that the magical barrier created by Mage Armor surrounds you and everyone you’re carrying, including the shield, thereby negating any bonus from the shield since you’ll only choose one method of calculating Base AC: “Some spells and sophistication features offer you a special thanks to calculating your AC. If you’ve got multiple features that offer you alternative ways to calculate your AC, you select which one to use.”
True, shields don’t count as armor, but they affect your base AC: “Armor Class (AC). Armor protects its wearer from attacks. The armor (and shield) you wear determines your base Armor Class.”
Mage Armor also affects Base AC: “The target’s base AC becomes 13 + its Dexterity modifier.”
Also, unless you’ve got proficiency in shields, which most magic users don’t start with, you could not even cast Mage Armor while wielding a shield:
“Your character must be proficient with armor and shields to wear and use them effectively, and your armor and shield proficiencies are determined by your class. There are drawbacks to wearing armor or carrying a shield if you lack the specified proficiency, as explained within the Equipment section.”
“Armor Proficiency. Anyone can be placed on a suit of armor or strap a shield to an arm. Only those proficient within the armor’s use skills to wear it effectively, however. Your class gives you proficiency with certain sorts of armor. If you wear armor that you simply lack proficiency with, you’ve got an obstacle on any ability check, saving throw, or attack roll that involves Strength or Dexterity, and you cannot cast spells.”