Gwen goes in to get it, but notices a poison dart in her arm and passes out. Ultimate Echo Echo turns into Four Arms and he and Kevin lift it. The map piece is behind a large piece of stone. They continue on and Ultimate Echo Echo accidentally sends poison darts flying at the team. The other attacks and is defeated by Ultimate Echo Echo. The team and the dragon fight, with Kevin killing one of the heads. The team falls down a chute and is attacked by a two-headed dragon. Ultimate Echo Echo pushes their mana raft to the shore with sound waves, saving them. Kevin activates a booby traps that sends him and Gwen plummeting into an acid lake. Gwen locates the map and they follow her through the temple. Gwen tracks the map piece, but activates a booby trap that sends a spiked hammer crashing into the team. Ultimate Echo Echo defeats Necrofriggians with sonic disks. The team fights and Big Chill, frozen, turns into Echo Echo and then Ultimate Echo Echo. Big Chill mentions that they intend to take an artifact and the Necrofriggians attack. Ben turns into Big Chill to win their trust, despite the fact that his Plumber suit will be gone when he changes back. The temple is in the middle 'twilight zone', inhabited by Necrofriggian settlers. They travel to Mykdl'dy, a half-frozen and half-molten planet that has the first piece of the map. Azmuth tells them that to win, they only need to stop Aggregor one out of four times, but that they have to stop Aggregor. Azmuth tells them that the Forge of Creation will give Aggregor the ultimate power, and that Paradox has hidden it with a Chronal Randomization Barrier. Azmuth says that he needs a new central nervous system and Galvan come to take him away, despite his protests. Max reveals that Aggregor is going to the Forge of Creation, but Gwen and Azmuth say that he is injured. He tells them that Paradox divided it into four pieces and hid them all over the galaxy, and that the powers of Aggregor's prisoners will allow him to get them. He shows them a picture of the Map of Infinity, a map of the entire universe. He gets their attention and says that Aggregor doesn't need a ship, but Azmuth knows where he is going.ДЄzmuth teleports the team to his lair on Galvan Mark II. He has information, but the team ignores him.

Azmuth examines the Ultimatrix and says that it is poor construction, but that Ben isn't ready for his third Omnitrix. Humungousaur comes back, but turns back into Ben and falls unconscious after Aggregor's beating. He says that he is immune to mana, as is Galapagus's species. He shocks Max, knocking him out, and easily defeats the team.

Aggregor reveals that he didn't feel anything and proceeds to attack Humungousaur. Humungousaur, furious at Aggregor for killing the aliens, viciously attacks and beats him, throwing him all over the base until Gwen tells him to stop. Paradox claims that past-Ben will dismiss the entire experience as a dream while present-day Ben resolves to stop Kevin.Continued from UAS1E10 Ultimate Aggregor. Paradox arrives at that moment to take them home before the other Celestialsapiens wake up and return past-Ben to his own time period. Past-Ben manages to get through to Kevin, who spares AggregorвЂ™s life before flying away, claiming he wonвЂ™t be so merciful tomorrow. Kevin easily defeats Aggregor before absorbing his stolen power and attempting to kill him only to be met with opposition from Gwen and both Bens. He now looks like his old self but has the new aliens instead of the old ones. In a last-ditch effort, Kevin absorbs energy from present-BenвЂ™s Ultimatrix, but the process drives him insane. Aggregor reaches the egg at the same time the group does and takes everyone out with ease.

As they make their way through the Forge, they discover many Celestialsapiens in debate with themselves, and eventually a Celestialsapien egg. After a few difficulties, past-Ben teams up with his future self to stop Aggregor. Paradox takes them to the Forge of Creation, where an accident pulls BenвЂ™s ten-year-old self out of the timestream. After a brief argument, Paradox and Azmuth explain that the Forge of Creation is where all Celestialsapiens (Alien XвЂ™s race) are born, and Aggregor hopes to absorb the powers of a newborn Celestialsapien and become all-powerful. When this fails, Paradox arrives and changes Alien X back to Ben. Ben resolves to become Alien X to get Bellicus and Serena to cooperate. Azmuth is upset with Ben, Gwen, and Kevin for letting Aggregor get all the pieces of the Map of Infinity.

Ben ten ultimate alien aggregor