Bolstering

• Bolstering
• When any non-boss enemy dies, its death cry empowers nearby allies, temporarily increasing their maximum health by 15% and damage by 20%.

Bolstering is a level 14 affix for Mythic+.

Patch changes

• Patch 10.1.0 (2023-05-02):
  • Moved from Level 4 to Level 14.
  • Bolster no longer increases the health of affected enemies (was health and damage).
    
• Patch 9.1.5 (2021-11-02): Bolster now has a 20 second duration (was permanent).
  
• Hotfix (2020-12-22): The damage against enemies with Flesh Crafter's Throw Cleaver no longer increases with stacks of Bolster from the Bolstering Affix on Mythic Keystone difficulty.
  
• Patch 7.0.3 (2016-07-19): Added.
  

External links

• Wowhead
• WoWDB