Not yet observed in the beta: the Forever client retains this item's record without its stats. Those are sent by the server in-game.Until someone records it, the Classic tooltip is shown below. Forever has reviewed every dungeon's loot, so changes are expected.
In Classic Era, dropped by Baron Rivendare, Stratholme Service Gate(17%).
Classic 1.15.9.69722
Thuzadin Mantle
Binds when picked up
ShoulderCloth
67 Armor
+11 Stamina
+18 Intellect
Requires Level 58
Equip: Increases damage and healing done by magical spells and effects by up to 12.
Sell Price: 1g 64s 76c
Forever Beta 1.60.1.70009
This item does not exist in the Forever client.