The monstrous squid declares his intent to conquer Ben's universe, and summons the Esoterica to destroy the heroes. Despite debuting his Ultimate Way Big form, Ben 10 sinhala cartoon fails to defeat the extradimensional fiend, who proceeds to destroy Sir George by electrocuting him with dark lightning. All seems lost until Vilgax returns, capturing Diagon by Psyphon's power-absorbing machine. Before the heroes can stop him, Psyphon proceeds to transfer Dagon's power to Vilgax, making the galactic conqueror into a nearly-unstoppable force. Gwen warps Ben, Kevin and herself into the Plumber's base in Mount Rushmore to hide from Vilgax, but the newly-empowered villain tracks them down and has his horde of Esoterica attack. Gwen uses the base's defenses to repel the brainwashed humans, but Vilgax personally attacks the base and disables both Gwen and Kevin. Confronting his old foe, Ben 10 sinhala cartoon wields George's sword, Ascalon, and uses it to drain Dagon's power from Vilgax. Reverted to his original form, Vilgax tries to corrupt Ben, asking what he plans to do with the combined power of Ascalon, Diagon, and the Ultimatrix. Ben declares his intent to revert the Esoterica into humans, but Vilgax derides him for thinking "too small"; with his new power, Ben could destroy all evil in the universe. Gwen and Kevin both encourage Ben to resist Vilgax's temptation, and Julie (in Ship's armor mode) arrives to further sway her friend away from the path of tyranny. Ben demands quiet as he considers his options, and after remembering his adventures, he uses his infinite godly abilities to transform the Esoterica back into humans. To everyone's surprise, Azmuth appears before them and asks Ben to return Ascalon and the Ultimatrix to him. Ben wonders if he has not yet proved his worthiness to the diminutive alien, but Azmuth corrects him; the Ultimatrix is no longer worthy of him. He gives Ben sinhala cartoon a new version of the Omnitrix; the "true" version Azmuth has been developing ever since he gave Ben the prototype six years ago. Cryptically suggesting that Ben may get the Master Control at a later date ("Perhaps on your eighteenth birthday"), Azmuth disappears, leaving the heroes to bask in victory. Afterwards, Azmuth deactivates the Ultimatrix because it was merely a prototype.
