Description
Your Shadow damage spells have a 33/66/100% chance to increase the Shadow damage you deal by 2% for 15 sec, stacking up to 5 times.
Position confidence
row: Confirmed (talentsforever.com JSON + foreverchanges.pro tier listing); column & arrow: Reported (explicit only in talentsforever.com data/priest.json)
Change notes
Classic: 5 ranks, 20% per rank, +3% Shadow damage taken debuff on the target. Now a self-buff. Rank 1 read.