Description
Allows 17/33/50% of your Mana regeneration to continue while casting.
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: 5/10/15%. Rank 1 read; ranks 2-3 are talentsforever estimates. Column 3 -> 4.