
A suit of armor made from hundreds of jade tiles painstakingly wired together over a layer of padding. Each tile bears a single etched character; together they form a powerful charm of protection (a character that succeeds an Intelligence ability check recognizes this; spellcasters have advantage on the roll).
The suit itself protects as medium armor, but encumbers the wearer as if it was heavy armor. However, it also grants advantage on all saving throws to resist magical spells and abilities. The wearer is also immune to all forms of mind control and possession. The whole suit must be worn to gain the armor’s supernatural protections; removing any piece breaks the charm.
The real value of the armor might just be that it’s made from a small fortune in precious stone.