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 Golem Lord Argelmach, Blackrock Depths(9.5%).
Classic 1.15.9.69722
Naglering
Binds when picked up
Unique
Finger
+10 Stamina
Requires Level 54
Equip: When struck in combat inflicts 3 Arcane damage to the attacker.
Equip: Increased Defense +5.
Sell Price: 1g 71s 57c
Forever Beta 1.60.1.70009
This item does not exist in the Forever client.