Mage · Fire · tier 1 · from level 10

Incineration

+13.0 Fire Blast

3/3 · level 60 · per cast · and 2 more

Incineration 123

Rank 3/3

Increases the critical strike chance of your Fire Blast, Ice Lance, Arcane Blast, and Scorch spells by 6%.

Fire Blast +3.0% +13.0 Arcane Blast +3.0% +11.3 Scorch +3.0% +5.2

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.