Warlock talent · row 4 of Affliction, from level 25 (20 with Talented 5/5) · Physical

Malevolence

Increases the critical effect chance of your Shadow spells by 1/2/3/4/5%.

Game files · build 1.60.1.70291New in ForeverRead straight from the WoW Forever beta client.

In Blizzard's notes

What Blizzard said about Malevolence, each line checked against the files.

Matches the files
Malevolence: (New row 4 talent.) Increases the critical effect chance of your Shadow spells by up to 5%.
The files Malevolence (1310949) is Affliction row 4 at 1-5% Shadow spell crit (tooltip); it isn't in the Classic tree.
Malevolence Class deep dives: Rogue and Warlock

69876 Sep 16First beta build we archived. No changes in the client files since.