Description
Increases the damage dealt or life drained by your Shadow spells by 1/2/3/4/5%.
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: 2% per rank; column 2 -> 3. Only some ranks were read from footage; other ranks follow talentsforever's linear scaling (scaleIdx).