Thornmail Unique: On being hit, returns 30% of damage, before any reductions such as armor, as magic damage. At least 15 damage must be received.
As an AD Carry that relies in auto-attacks (eg.Ashe, Tryndamere, Master Yi, etc), What's the better way to counter Thornmail? (Providing some kind of source will be of great help, not only beliefs and guesses)