3.1.2 PTR changes for Warlocks

[Vitandus]

    * Fire and Brimstone: Now increases the damage done by your Incinerate and Chaos Bolt by 3/6/9/12/15% on targets afflicted by Immolate, and increases the critical strike chance of your Conflagrate by 5/10/15/20/25%.
    * Sacrifice (Voidwalker) redesigned: Sacrifices a portion of the Voidwalker's health, giving its master a shield that will absorb X damage for 30 seconds. While the shield holds, spell casting will not be interrupted by damage. 1-minute cooldown.

[Kotodama]

The Sacrifice change is interesting...  sounds like a PvP change, a very useful one.

[Vitandus]

Sounds like it may help with AoE raid damage, as well.

[Skree]

That new fire and brimstone is awesome for destrolocks