Wikia

Roar of Sacrifice
Roar of Sacrifice 40 yd range 1 min cooldown Instant Protects a friendly target from critical strikes, making attacks against that target unable to be critical strikes, but 20% of all damage taken by that target is also taken by the pet. Lasts 12 seconds.
Usable by
Class	Hunter
Pet	Cunning pets
Properties
Type	Utility
School	Nature
Cooldown	1 min
Related buff
Roar of Sacrifice Immune to critical strikes, but damage transferred to the Hunter's pet. Duration: 12 seconds

Roar of Sacrifice is a core cunning pet ability that allows the hunter's pet to absorb damage from a friendly target.

Patch changes

Patch 5.0.4 (28 August 2012): No a cunning ability.
Patch 3.2.0 (04-Aug-2009):
- Redesigned. This ability can now be used on any friendly target to make that target immune to critical strikes, but the hunter pet takes 20% of all damage taken by that friendly target. Cooldown is now 1 minute, up from 30 seconds.
- Damage transferred to pet is now considered Nature damage.
Patch 3.1.0 (14-Apr-2009): Can be used on the hunter only.
/ Patch 3.0.2 (14-Oct-2008): Added.