Ancestral HealingA Restoration Shaman talent in WoW Forever: row 3 of the Restoration tree (level 20), 3 ranks, passive. Moved since Classic, same effect (was Restoration row 2). Read from the WoW Forever beta client.
What it does Restoration row 3

Ancestral Healing3 ranks · passiveRequires 10 points in Restoration Talents (level 20).Rank 1: Increases your target's armor value by 8% for 15 sec after getting a critical effect from one of your healing spells.Rank 2: Increases your target's armor value by 17% for 15 sec after getting a critical effect from one of your healing spells.Rank 3: Increases your target's armor value by 25% for 15 sec after getting a critical effect from one of your healing spells.Moved, same effect (was Restoration row 2). Classic rank 1: Increases your target's armor value by 8% for 15 sec after getting a critical effect from one of your healing spells.
What changed from Classic
Classic rank 1Increases your target's armor value by 8% for 15 sec after getting a critical effect from one of your healing spells.
WoW Forever rank 1Increases your target's armor value by 8% for 15 sec after getting a critical effect from one of your healing spells.
Alsowas Restoration row 2.
Around it in the Restoration tree
Every Restoration talent 16
From the WoW Forever beta client, checked in game with reader reports. Put points in Ancestral Healing in the Shaman calculator, read every Shaman talent in words (Elemental and Enhancement too), or see the racials, changed class abilities and Legacy perks.