Talk:Archmage (Season 2012 Mastery)/@comment-174.1.215.227-20120112113914

this mastery is additive. I have tested with no rune/no ap mastery (with the exception of Archmage) Kennen. when I have Dcap (140 AP), hextech revolver (40 AP), amplifying tome (20 AP) = 200 raw AP from item, the AP comes out to be 270 instead of 273 (which would happen if this mastery were multiplicative).