Mage · Arcane · tier 2 · from level 15

Arcane Concentration

+23.4 Arcane Blast

5/5 · level 60 · per 100 mana · and 13 more

Arcane Concentration 12345

Rank 5/5

Gives you a 10% chance of entering a Clearcasting state after any damage spell hits a target. The Clearcasting state reduces the mana cost of your next damage spell by 100%.

Arcane Blast +11.1% +23.4 Pyroblast +11.1% +19.6 Frostbolt +11.1% +17.7 Arcane Missiles +11.1% +17.3 Fire Blast +11.1% +14.4 Fireball +11.1% +14.3 Scorch +11.1% +13.1 Frostfire Bolt +11.1% +10.2 Blast Wave +11.1% +9.8 Blizzard +11.1% +9.0 Arcane Explosion +11.1% +6.9 Cone of Cold +11.1% +6.7 Frost Nova +11.1% +5.6 Flamestrike +11.1% +4.6

Averages, counting crits and misses, for a level 60 Mage with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.