Talk:Deathfire Touch (Season 2016 Mastery)/@comment-26274286-20160108102613/@comment-26071360-20160108150841

I believe it's because Vi E is an autoattack enhancer which I believe should trigger it. So attacking a champion directly with E will proc the single target effect, while the cone behind the target will proc as an aoe effect. I can't test that right now though, but I believe it should work that way. Vi's Q is an AoE effect as you can hit multiple champions with it, so it goes under the AoE proc.