With a nod to Everquest, something a bit more interesting than “just” +3 splint mail.
+3 ILLITHID BANDED MAIL
Armour (medium), Legendary
Mind Flayer banded mail acts as splint mail for stat purposes. Its made from a crystalline substance and is very light. Despite this it does not restrict movement breaking apart and instantly reconstituting itself to allow for articulation. It also provides resistance to psychic damage flaring outward as if shattering as it absorbs the damage before reforming itself in a slightly different design. Its ruby red in colour (and hence the name). Scholars have named the alien substance rubicite. Though it is usually found in the hands of the mind-flayers due to its gothic design and elegant filigree many learned men believe it is actually of githyanki make.