I think it's "Dragan" - and not "Dragon" - like Andrzej Dragan the photographer :
http://andrzejdragan.com/
Maybe I'm wrong but I never hear of "Dragon effect" before.
If you want Dragan effect you can download Draganizer script here :
http://atncentral.com/download.htm
"Sharon has developed an action version of the Dragan effect that has been the subject of much discussion on dpreview.com. Experiment with this approach and with Kent Christiansen’s “Grundge Effect” on this site and use the one that gets the closest to the effect you’re trying to achieve. Other examples are available at this
link ."