User blog comment:Willbachbakal/(Champion Concept) Burke, the Apothecary/@comment-70.109.179.246-20121216003141/@comment-1330314-20121216025549

What I mean with his E is that the slow stacks additively. For example, if the champion is at 0% movement speed reduction and you've maxed out Paralysis, your first attack puts them at 40% movement speed reduction, the second puts them at 80% and the third puts them at 120%, thus stunning them instead. IF the target were already slowed, say by 50%, your hit would put them at 90% movement speed reduction and the next would stun them.