The Greatest Lake

The Greatest Lake is the one hundred and forty-first episode of Ben 10.
==Synopsis==
While visiting Lake Erie, a relaxing day at the beach gets all washed up when Ben, Gwen and Grandpa Max come face-to-face with Hex, and his summer intern, Kevin!
==Plot==
At Lake Erie, Gwen and Ben (as Humungousaur) compare their cannonballing. Max then drives up to them in a speedboat he had just gotten his hands on, and offers to take them knee boarding. Though hesitant, Humungousaur agrees to the activity, and he and Gwen get on their boards, as something watches them. Max tries to drive the boat, but Humungousaur weighs it down, until he times out. They speed off, but Max stops the boat when Gwen points out Ben's flailing. As Gwen tries to explain how to knee board to Ben, watery hands begin to grab at them and Max. Hex then appears from beneath the waves, reading a scroll. Not paying attention, he calls off his minions, taking the three as beachgoers, and expositing about his plan to retrieve the Sword of McGuffin.
Ben calls out to the sorcerer, and causing Hex to realize who he has encountered. He prepares to attack them, but notices his minions, the Elementals, are becoming weakened. He instead calls on his new apprentice, who turns out to be Kevin, complete with an identical hood. Hex commands the Elementals to expose the temple containing the sword, leaving the Tennysons to Kevin. Max grabs teh cousins and they flee in the speedboat, and Kevin transforms into Undertow to chase them down. Using his newly-acquired ability to fly, Undertow quickly gains the upper hand on the Tennysons.
Undertow laments Hex being unwilling to use the swords on the Tennysons, allowing Ben to transform into Rath and pounce on him. Rath tells his family to deal with the Elementals, and they part ways. Meanwhile, Hex tries to enter the temple, but it drains his mana. He gets his Elementals to help, but they are quickly sent back to the surface by Max and Gwen, who have been destroying the others. Hex notices Undertow focusing on Rath, and reprimands him, frustrated by his disobedience. Rath tries to take on Hex, but is quickly defeated and reverts back to Ben. Hex, infuriated, revokes Undertow's magic, taking his hood. Undertow reverts back to Kevin, and he and Team Tennyson agree to team up against Hex.
The four are suddenly pulled to the bottom of the lake, which has been emptied so Hex can once more access the temple. A giant Elemental forms, and Hex orders it to fight them. Ben and Kevin transform into Cannonbolt and Bootleg respectively, and the former activates his Omni-Kix form. Omni-Kix Cannonbolt rolls into the Elemental's legs, but it easily recovers and counters him. As they continue to fight, Bootleg takes over the Tennyson's speedboat, arming it with a cannon. As Hex tries to open the temple's doors, Gwen, Max and Bootleg join Omni-Kix Cannonbolt's fight against the Elemental. However, it proves to be too much for the four. Gwen comes up with a plan, and she explains to Omni-Kix Cannonbolt that he needs to tear it apart from the inside. They go to distract it, and he gets inside the Elemental. He begins spinning, successfully defeating it. The defeat overwhelms Hex, causing him to once again be washed away by the current. Team Tennyson and Kevin are brought to the shore by the wave, as is Hex, who is promptly arrested by the police. Kevin whines about his loss of the sword, but quickly realizes how terrible being Hex's apprentice would be. Ben decides to continue knee boarding, now joined by Kevin, who is equally bad at the activity.
==Noteworthy Events==
===Character Debuts===
*Elementals
===Omnitrix Alien Debut===
*Omni-Kix Cannonbolt
==Characters==
*Ben Tennyson
*Gwen Tennyson  
*Max Tennyson
=== Neutrals ===
*Kevin Levin
===Villains===
*Hex
*Elementals
==Aliens Used==
===By Ben===
*Humungousaur (off-screen transformation)
*Rath
*Cannonbolt (cameo; goes Omni-Kix)
**Omni-Kix Cannonbolt (first appearance)
===By Kevin===
*Undertow
*Bootleg
==Quotes ==
==Naming and Translations==
==Cast==
==Allusions==
*The Sword of Macguffin's name is a reference to the term "Macguffin", an object that basically serves to kick start a plot.
*When Kevin uses Undertow to control the water, it is a reference to Mickey Mouse controlling water in the Fantasia segment The Wizard's Apprentice.
==Errors==
*In one shot, Rath's neck is entirely colored white.
*Before Ben transforms into Omni-Kix Cannonbolt, his right sleeve is missing for a few seconds.
Greatest Lake (312).png|Neck error
Greatest Lake (403).png|Missing sleeve
==References==
===Jenai Kaeo===
es:El_gran_lago
Category:Ben 10 Reboot Episodes
Category:Ben 10 Reboot Season Four Episodes
Category:Episodes