A Fistful of Brains

A Fistful of Brains is the thirty-eighth episode of Ben 10: Omniverse.

Plot
The episode starts as Ben and Rook are chasing Albedo in Undertown. Albedo runs into a building and Ben goes in too, and just as Rook was about to get in, they realized that it was a spaceship and it flew away. In Plumber Headquarters, Rook informed Max that Ben is missing. Meanwhile, Ben is trapped in Khyber's personal hunting preserve and encounters a wild Slamworm and tries to turn into Way Big but fails when the creature hits the tree Ben was on and turned into Cannonbolt. Then the wild Slamworm was nervous after a Crabdozer walks up behind Cannonbolt,afraid. It then hides underground leaving a flower on top of it. Then, the Crabdozer growled, making Cannonbolt afraid to look behind him, hoping if it wasn't his natural predator. Meanwhile, Rook and Max are trying to search for Ben's DNA across the galaxy.

Cannonbolt later encounters Khyber and his newest pet, a Khyber's Panuncian. Ben turns into Ditto and realized that the Panuncians are the predators of Splixsons. He splits into four and runs away from it, with one going into an iceland, one going into a desert and two going into a cave. The Ditto in the cold area runs into a Panuncian, but manages to escape when he splits into three and the trio swims together to get away from the predator. In the desert, the other Ditto digs underground, playing Whack-a-Ditto with the Panuncian. At the cave, the other Dittos split into three, going into three tunnels. The Panuncian then splits into the same amount to chase them. One of the Ditto clones sees the end of the cave, and the other Dittos follow, with the Panuncians on their tail.

Meanwhile, Rook and Max land themselves on Khoros. Rook and Max find a white hair which matches Ben's DNA, but is instead Albedo's. Then they go back to the spaceship and tries again to search Ben's DNA. Magister Patelliday then shows up on a computer to inform the two that he didn't find Ben's DNA, but Rook and Max already found his DNA and follow it. Back at the desert, the Panuncian realized that the Ditto split into ten, and the Panuncian splits into ten as well. They then chase the ten Dittos, but they manage to escape through the Panuncians. Back on the iceland, the other Dittos manage to escape through a tunnel after merging all Dittos into one. After Ben turned back, he saw Khyber who turns the Panuncians into all of the Nemitrix aliens, leaving him surrounded. Rook and Max finally reach the galaxy where Ben's DNA is located, then Albedo shows up on their computer, informing the two that he sent them some drones to defeat them.

At the hunting preserve, Ben tries to turn into Way Big again, but gets Astrodactyl and flies into the sky, and learns that it wasn't a sky, it was a spaceship. Astrodactyl breaks it and then goes through it, reaching Albedo's location. Then, Astrodactyl sees Albedo as Brainstorm, of whom he mistook for Dr. Psychobos, then they fight. Astrodactyl reverts back to Ben, and Albedo takes his Galvan form and then turns into Ultimate Albedo and shows Rook and Max that they are in trouble. He then shows a device so that Rook and Max won't able to find Ben and he tries to shoot lasers on Ben, but they instead hit the device. Meanwhile, Rook and Max encounter Albedo's drones, as the spaceship shows up where Ben was on.The drones followed them to the spaceship, but were defeated by Max. Meanwhile, Ben tries to fight Ultimate Albedo as Eye Guy, Upchuck, and Goop but fails. He then turns into Shocksquatch to battle him, but Albedo turns into Ultimate Spidermonkey who easily defeats him. Albedo then turns into Ultimate Humungousaur and Ben turns into Crashhopper and Diamondhead but is defeated. Rook and Grandpa Max arrive, and Ben tries to turn into Way Big again, but for the third time mistransforming, this time into Feedback and defeats Ultimate Humungousaur and reverts Albedo to his Galvan form. Rook and Max capture Albedo, but then Khyber arrives and shows them that they have Azmuth held captive.

Major Events

 * Khyber's Panuncian Pet makes his debut.
 * Azmuth is kidnapped by Khyber and Albedo.

Characters

 * Ben Tennyson
 * Rook Blonko
 * Max Tennyson
 * Azmuth (cameo)
 * Magister Patelliday (cameo)
 * Tentacle Vendor (cameo)

Villains

 * Khyber
 * Khyber's Panuncian Pet (first appearance)
 * Albedo
 * Ultimate Albedo

Other

 * Wild Slamworm

By Ben

 * Cannonbolt (accidental transformation; intended alien was Way Big)
 * Ditto
 * Astrodactyl (accidental transformation; intended alien was Way Big)
 * Eye Guy
 * Perk Upchuck (cameo)
 * Goop (cameo)
 * Shocksquatch
 * Crashhopper
 * Diamondhead
 * Feedback (accidental transformation; intended alien was Way Big)

By Albedo

 * Brainstorm
 * Albedo's true form (x2)
 * Ultimate Spidermonkey
 * Ultimate Humungousaur

By Khyber's Panuncian Pet

 * Crabdozer
 * Omnivoracious
 * Terroranchula
 * Slamworm
 * Hypnotick
 * Tyrannopede
 * Mucilator
 * Buglizard
 * Vicetopus

Errors

 * In one scene, black stripes on Rook's head are gone.
 * After Ben detransforms from Shocksquatch, Ultimate Spidermonkey's web was gone.
 * In one scene, when the Panunsians were chasing the Dittos there were 5 Panuncians instead of 4.
 * In three scenes, Negative Ultimate Humungousaur's Ultimatrix symbol was crooked.
 * The credits say that Ultimate Echo Echo and Ball Weevil appeared, but neither one did.

Allusions

 * The title of this episode is a reference to the cowboy movie "A Fistful of Dollars".
 * Ben's note on "surviving until sundown" is a reference to the 1924 short story The Most Dangerous Game. The episode had many similarities to the story, such as Khyber's Panuncian being similar to General Zaroff's hounds.
 * It alludes to Looney Toons when Ditto says "I knew we shouldn't have taken that left turn at Albuquerque." this line is a running gag in various Merry Melodies staring Bugs Bunny.
 * Ben's continuous attempts at transforming into Way Big in this episode is similar to the running gag of Ben trying to become Humungousaur during the first arc of Omniverse.

Trivia

 * This episode aired in Spain on November 21, 2013.
 * All Nemetrix aliens appeared in this episode with the debut of Khyber's Panuncian.
 * It is revealed that:
 * Ditto can survive underground.
 * Ditto is quite agile and can jump very high.
 * Astrodactyl is vulnerable to electricity.
 * Upchuck cannot swallow Ultimate Albedo's energy beams.