Description
Allows 17% (rank 1) of your Mana regeneration to continue while casting; higher ranks not transcribed (Wrath equivalent: 17/33/50%).
Position confidence
row: Confirmed (talentsforever.com JSON + foreverchanges.pro tier listing + page order on classicwowforever/wowforevertalent); column & arrow: Reported (explicit only in talentsforever.com data/druid.json)
Change notes
Classic: 5% per rank. Icy Veins: improved for more in-combat regen.