Warlock talent · row 2 of Affliction, from level 15 (10 with Talented 5/5) · Physical

Malediction

Increases all periodic damage done by your Warlock spells by 1/2/3/4/5%.

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

In Blizzard's notes

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

Matches the files
Malediction: (New row 2 talent.) Increases all periodic damage done by your Warlock spells to a maximum of 5%.
The files Malediction (1225177) is Affliction row 2 at 1-5% more periodic damage from Warlock spells; it isn't in the Classic tree.
Malediction Class deep dives: Rogue and Warlock

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