Any nonmagical suit of heavy armor can be turned by mind flayers into mind carapace armor. Only one creature can attune to it: either a specific mind flayer or one of its thralls. While worn by any other creature, the mind carapace armor functions as normal armor of its kind. To its intended wearer, the armor grants advantage on Intelligence, Wisdom, and Charisma saving throws and makes its wearer immune to the frightened condition.
The wearer has Disadvantage on Dexterity (Stealth) checks.
If the wearer has a Strength score lower than 15, their speed is reduced by 10 feet.