It was the Visitor On Deck one. That was the mark on the airship. I can't remember if he used invert as he didn't really get a chance to do anything since I defeated him really quick.
I used my leader to cast Reverse on it and then had my 2nd person begin casting Renew while Reverse was 2/3's or so through the charge process. After that, I had my 3rd person attack or use magic. You have to get the timing of Reverse and Renew right making sure Reverse sticks on him. For me, Reverse happened to stick on him upon the first casting of it.