I really like the idea of the infinite watchknight tonic that you can fight while transformed it brings back old memories. In GW1 I have an endless Shiro Tagachi ( the final boss in Factions expansion pack ) tonic, I loved playing as him in other pve stories like eotn and it was epic when in the cinematics and dialogs my character looked like him.
A question to Anet, maybe they’ll answer it
The idea of this kind of tonics is very good and can give a lot of opportunity. Do you plan to make more of these? I woluld kill for an infinite Dredge tonic