Force Armor (5e Spell)
From D&D Wiki
|Casting time:||1 minute|
|Duration:||24 hrs, Till short or long rest|
You touch a willing creature who isn't wearing armor, and a protective magical force surrounds it until the spell ends. The target's base AC becomes 13 + its Intelligence modifier. The spell ends if the target dons armor or if you dismiss the spell as an action.
At Higher Levels. This spell’s ac gets a bonus +2 when you reach 5th level, 11th level (+4), and 17th level (+8).