- Drakefire Amulet
- Binds when picked up
- Unique
- Neck
- +15 Fire Resistance
+10 Stamina - Requires Level 50
- Item Level 63
- "The Blood of Drakkisath Flows Within..."
The Drakefire Amulet is the key to Onyxia's Lair. Though it does not necessarily need to be worn in order to enter, it must be in your inventory.
See Onyxia's Lair Attunement for details on how to obtain this item as Horde or Alliance.
Source
This item is a quest reward from the following quests:
[60R] Blood of the Black Dragon Champion- [60R] Drakefire Amulet
[60R] 
[60R] Item deletion
To restore the key simply talk to Haleh (Alliance) or Rokaro (Horde) and you will receive a new key.