Description
Your Shadow Bolt critical strikes increase Shadow damage taken by the target from your attacks by 4% for 12 sec. (rank 1 of 5 value; other ranks not transcribed)
Position confidence
row: Confirmed (talentsforever.com JSON + foreverchanges.pro tier listing); column & arrow: Reported (explicit only in talentsforever.com data/warlock.json)
Change notes
Classic: 4/8/12/16/20%, consumed by 4 damage sources, affected all Shadow damage. Now only your own attacks, with no charge limit.