This is a new mechanic for future episodes that requires you to have any physical contact with a NPC, but the only role that's able to make contact of course is the Tanks so they can draw aggro, If a non-role touches the NPC he or she will faint. I don't know if DC officials will allow this ability to surface without "Ghost Fox Killer" herself, but it will surely make a fun mechanic.
I like it. No matter what, you will always need a tank till you can burn the boss down in seconds, which will only be a problem wayyyyyyyyyy into the future.