This was weird: I put out a Fallen Elf and played Quintessence on it immediately. The Level 5 AI had a Fire Shield (or it could have been the upgrade; didn't think to check at the time) and it then proceeded to kill my Fallen Elf over the next two turns. Shouldn't immaterial creatures be immune from the effects of the Fire Shield?
Perhaps related in terms of how Quintessence works, I've also noticed that playing Quintessence on a creature that already has a virus does not stop the virus from killing that creature. Perhaps this is intentional though?
