To Make The World Go Away

'''Ophanimon's castle is now the only thing that stands between the Royal Knights and Lucemon's revival. The warriors make it there first, but even with all the knowledge of the Digital World stored in the castle, can they find the key and protect it before the Knights arrive?'''

Summary
The episode starts with EmperorGreymon, MagnaGarurumon and the group flying towards Ophanimon's castle. As they enter, they find themselves in a library filled with books. The group meet Nefertimon inside, who tells them that she knows of their possession of the spirits of the Legendary Warriors. She then reveals to them that the books contained within the library contain all information ever known to the Digital World – she does not, however, know where the key is. The group decides to split into groups of two to search around the library. Bokomon and Neemon head outside, while Koichi and Koji head upstairs. Zoe and Takuya head to the basement leaving Tommy Himi and J.P. to check the inner rooms. Koichi is still troubled by Crusadermon's revelation that he has no physical form. Instead of searching for the key, J.P. begins to do magic tricks to attempt to cheer up Tommy, and both eventually tell each other how scared they are.

In the basement, Zoe confesses to Takuya that the group are the first real friends she’s ever had, and that she doubts she’ll have trouble making them again because she likes herself now. Takuya tells her that he likes her too, before hastily adding “You know, not like like.” Embarrassed, both turn back to their searching. After a brief pause, Zoe turns round to Takuya to say something, but he has fallen asleep.

The group meet back in the main room to find that none have had any success in finding the key. Bokomon reveals to Kouichi that he knows what Crusadermon told him, but promises not to tell the others what he knows. Nefertimon senses that the Royal Knights are approaching, moments before they knock down the door. Takuya and Koji Spirit Evolve into EmperorGreymon and MagnaGarurumon, as Crusadermon reveals that Nefertimon is the key. Nefertimon asks Takuya and Koji to destroy her and protect Ophanimon’s castle. They refuse and fly out of the castle to fight the Royal Knights. EmperorGreymon and MagnaGarurumon are both defeated by the Royal Knights, who take Nefertimon’s data, and then take the castle’s data, thus destroying the entire Digital World. It is then that Lucemon is freed, and reveals his plans to create a new Digital World. He attacks the children, but they’re saved by Angler the Trailmon who takes them to the moon.