Description
Increases your Armor by an amount equal to 25/50% of your Intellect.
Position confidence
row: Confirmed (talentsforever.com JSON + foreverchanges.pro tier listing); column & arrow: Reported (explicit only in talentsforever.com data/mage.json)
Change notes
Classic: 1 rank (50%) at tier 3. Now 2 ranks at tier 2. Rank 2 inferred.