Aura refresh (tier 3) is a reward that can be bought from the Soul Reaper rewards shop for either 15 reaper points or 150 slayer reward points. This is a consumable item and it does not need to be in your inventory to use - in the bank is fine when you use aura management. It refreshes the cooldown for tier 3 combat auras, specifically:
- Ancestor spirits aura
- Berserker aura
- Dark magic aura
- Maniacal aura
- Master invigorate aura
- Master knock-out aura
- Master poison purge aura
- Master reverence aura
- Master runic accuracy aura
- Master sharpshooter aura
- Reckless aura
- Regeneration aura
Using the aura refresh on one of these auras will make it so you can immediately use the aura again.