Talk:Kog'Maw/@comment-4068613-20160101191212/@comment-4068613-20160107020529

Turrets have immunity to all on-hit effects currently in the game that are toggled, have a duration, or are always on, with the exception of Blue Elixir.

Kog doesn't have access to any on-hit effects that benefit from attack speed and also work against turets, again, with the sole exception of Blue Elixir.