Rogue talent · row 6 of Assassination, from level 35 (30 with Talented 5/5) · Physical

Seal Fate

Your critical strikes from abilities that add Combo Points have a 20/40/60/80/100% chance to add an additional Combo Point.

Game files · build 1.60.1.70291Read from the WoW Forever beta client, build 1.60.1.70291.

Compared with Classic

Classic tooltip

Your critical strikes from abilities that add combo points have a 20% chance to add an additional combo point.

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

Partly
Seal Fate: No longer requires Cold Blood as a pre-requisite. Note that Mutilate will trigger this exactly once if either or both hands generates a critical strike.
The files The Cold Blood requirement is gone: Classic's Seal Fate (talent 283) required Cold Blood (talent 280), and the 70291 node has no prerequisite. The once-per-Mutilate rule isn't in any field we can read.
Seal Fate Cold Blood Class deep dives: Rogue and Warlock

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