VengeanceA Balance Druid talent in WoW Forever: row 4 of the Balance tree (level 25), 5 ranks, passive. Changed from Classic. Read from the WoW Forever beta client.
What it does Balance row 4

Vengeance5 ranks · passiveRequires 15 points in Balance Talents (level 25). Requires Improved Moonfire.Rank 1: Increases the critical strike damage bonus of your Arcane and Nature spells by 20%.Rank 2: Increases the critical strike damage bonus of your Arcane and Nature spells by 40%.Rank 3: Increases the critical strike damage bonus of your Arcane and Nature spells by 60%.Rank 4: Increases the critical strike damage bonus of your Arcane and Nature spells by 80%.Rank 5: Increases the critical strike damage bonus of your Arcane and Nature spells by 100%.Changed from Classic. Classic rank 1: Increases the critical strike damage bonus of your Starfire, Moonfire, and Wrath spells by 20%.
What changed from Classic
Classic rank 1Increases the critical strike damage bonus of your Starfire, Moonfire, and Wrath spells by 20%.
WoW Forever rank 1Increases the critical strike damage bonus of your Arcane and Nature spells by 20%.
Around it in the Balance tree
Gone from Classic BalanceNature's Grasp, Improved Nature's Grasp, Natural Weapons, Improved Thorns, Omen of Clarity.
Every Balance talent 16
From the WoW Forever beta client, checked in game with reader reports. Put points in Vengeance in the Druid calculator, read every Druid talent in words (Feral Combat and Restoration too), or see the racials, changed class abilities and Legacy perks.