From WoWWiki
Overview
As of Patch 1.11, Blizzard gave shamans the talent Healing Grace. Healing Grace reduces the threat generated by a shaman's heals by up to 15% after 3 ranks. This gives shaman the ability to heal in comfort and not have to worry about pulling healing aggro.
Prequisites: 10 points in the Restoration talent tree.
| Rank | Effect
|
| Rank 1/3
| 5% Threat Reduction
|
| Rank 2/3
| 10% Threat Reduction
|
| Rank 3/3
| 15% Threat Reduction
|
Upcoming Changes
In Patch 2.4, Healing Grace will also reduce the chance that the shaman's buffs are dispelled by up to 30%. (Source)