Patch 10.0.0 (2022-10-25): Now a row 5 Fire talent (was a level 23 Fire ability). Rank 2 effects are now baseline. Icon changed from
Patch 9.0.1 (2020-10-13): Rank 1 now learned at level 23 (was 10), and rank 2 learned at level 47 (was 65).
Patch 7.1.5 (2017-01-10): Now learned at level 10 (was 57) and gives a +15% chance to critically strike with spells. Rank 2 added at level 65: You gain 10% more of the Critical Strike stat from all sources.
Hotfix (2012-12-11): Critical Mass now multiplies the critical strike chance of Fireball, Frostfire Bolt, Pyroblast, and Scorch by 1.3 (was 1.25).
Hotfix (2012-11-29): The critical strike chance multiplier from Critical Mass has been reduced to 1.25 (was 1.5).
Patch 5.0.4 (2012-08-28): Redesigned as a level 36 Fire ability (was a tier 6 Fire talent). Multiplies the critical strike chance of your Fireball, Frostfire Bolt, Pyroblast, and Scorch by 1.5. Icon updated from
Old: Your [Living Bomb] and [Flame Orb] spells deal 5/10/15% more damage, and your Pyroblast and Scorch spells have a 33/66/100% chance to cause your target to be vulnerable to spell damage, increasing spell critical strike chance against that target by 5% and lasts 30 sec.
Patch 4.0.1 (2010-10-12): Redesigned as a tier 6 talent (was tier 5). Your Living Bomb and Flame Orb spells deal more damage, and your Pyroblast]and Scorch spells have a chance to cause your target to be vulnerable to spell damage, increasing a spell critical strike chance against that target by 5% and lasts 30 sec.
Old: Increases the critical strike chance of your Fire spells by 2/4/6%.
Patch 2.0.3 (2007-01-09): The mage Fire talent "Critical Mass" will now properly update on the character sheet UI.