Talk:Shyvana/@comment-4540135-20111101210141/@comment-4504221-20111101223453

Flame Breath's Passive effect does 15% magic damage based on Flame Breath's damage For example, with no AP, Rank 1 Flame Breath does 80 damage, and all your attacks on the debuffed target will do 12 bonus magic damage from the passive.

Extra damage from AP does effect this, so if you had with AP, 300 damage on Flame Breath at Rank 5, than you'd do 45 bonus damage from the passive.