Sanzu River
Serrator officially debuted in "Something Fishy" where he had been at the bottom of the Sanzu River and was revived by Master Xandred's recent power surge. He arrives aboard Master Xandred's ship to offer his services and revealing himself to be the one who sent Switchbeast. He shows off his heightened powers by obliterating an army of Moogers with a single blast and manages to convince a skeptical Master Xandred of his loyalty and asks for permission to enter the human world to scare enough humans to flood the river. Once on Earth, he introduces himself to the Rangers, and during their battle seems to have the Rangers beat, with all of the weapons they wielded unable to affect him. Serrator even cuts a piece of paper into a shape and creates Papyrox from it. In the nick of time, Antonio arrives and manages to use the Lightzord to successfully damage Serrator. Serrator then leaves commenting that the Rangers had "passed the test" for now.