Phylactery of the mists

From LSWiki

This is a phylactery, a sort of amulet, of a kind often bearing religious
significance, mounted on a long strap, half extending from either side of it,
intended to be wrapped around the arm or the forehead, made of black leather
strips and opal.  The quality of its craftsmanship is excellent.
   It is badly chipped and cracked.
   It is intermediate in size, and looks just about right to fit you.  It
looks about seven tenths of a dimin across and a tenth of a dimin long.  It
weighs about a twentieth of a dekan.

Appears to grant a small amount of magickal resistance, while reducing the wearer's order/chaos resistance slightly.