The Bone Chain is a Unique Chain Mail found in Diablo: Hellfire.
It is a useful mid-level armor, even though it is rather limited in the bonus stats. The Armor Class bonus against the Undead is a nice touch, but it is not enough to make this a viable late game armor, especially since there are no undead in the Hell levels and only a few in the Crypt.
Stats[]

Bone Chain
Chain Mail
- Armor Class: 40
- Extra 60 Armor Class vs the Undead
- Requirements: 30 Strength
- Durability: 55
- Quality level: 13
- Availability: Single Player and Multiplayer. Hellfire only.
Diablo I Unique Body Armor — Torn Flesh of Souls (Rags) • Nightscape (Cape) • The Rainbow Cloak (Cloak) • Wisdom's Wrap (Robe) • Leather of Aut (Leather Armor) • The Gladiator's Bane (Studded Leather Armor) • Arkaine's Valor (Ring Mail) • Scavenger Carapace (Breast Plate) • Sparking Mail (Chain Mail) • Naj's Light Plate (Plate Mail) • Demonspike Coat (Full Plate Mail)
Hellfire Unique Body Armor — Bone Chain (Chain Mail) • Bovine Plate (Plate Mail) • Demon Plate (Full Plate Mail) • Armor of Gloom (Full Plate Mail)