Each slot requires a certain level reached for the Heart of Azeroth.
- Major slot: 35
- Stamina Increase 1: 53
- Minor Slot: 55
- Stamina Increase 2: 57
- Stamina Increase 3: 62
- Minor Slot: 65
- Stamina Increase 4: 67
- A second forge is found within Ny'alotha, the Waking City for testing purposing in the 8.3 PTR which uses the Altar of the Eternal Hunt model.
- Patch 8.3.0 (2020-01-14): Added one new minor slot and three stamina increase slots.
- Patch 8.2.0 (2019-06-25): Added.