When you are In Shadowlands, your BFA necklace and legendary back power is inactive. When you leave it, the power becomes active again.
The best place to use them is therefore during Timewalking dungeons when your gear gets scaled to the ilvl of the Timewalking event.
Other posts
- Venari reputation is now account wide
- Tank changes and how it affects each tank class in 9.0.5
- Legendary changes in 9.0.5
- Covenant and Conduit changes in 9.0.5
- Class Ability Changes 9.0.5
- Boss Tactics: Mythic Shriekwing
- Grateful Offerings Farming Guide
- PvP changes in 9.0.5
- All that comes in patch 9.0.5
- Best covenants for each class in 9.0.5
