Boon of Bul-Kathos

Boon of Bul-Kathos Passive Base cooldown of all three Rage skills is reduced by fixed amount: Earthquake: 15 seconds. Call of the Ancients: 30 seconds. Wrath of the Berserker: 30 seconds. The aid of the Immortal King shall come to those who have earned it.

Boon of Bul-Kathos is a Barbarian passive skill in Diablo III, unlocked at character level 60.

In-game

This effect is applied before any other methods of cooldown reduction are taken in account.

Barbarian Skills

Primary Skills
Bash • Cleave • Frenzy • Weapon Throw
Secondary Skills
Hammer of the Ancients • Rend • Seismic Slam • Whirlwind • Ancient Spear
Defensive Skills
Ground Stomp • Leap • Sprint • Ignore Pain
Might
Overpower • Revenge • Furious Charge • Avalanche
Tactics
Threatening Shout • Battle Rage • War Cry
Rage
Earthquake • Call of the Ancients • Wrath of the Berserker
Passive Skills
Pound of Flesh • Ruthless • Nerves of Steel • Weapons Master • Inspiring Presence • Berserker Rage
Bloodthirst • Animosity • Superstition • Tough as Nails • No Escape • Relentless
Brawler • Juggernaut • Unforgiving • Boon of Bul-Kathos • Earthen Might • Sword and Board • Rampage