Cid : The Adventure of the Underground Waterway Cid : The Adventure of the Underground Waterway is the fifth episode of " " . Story Detail . Prologue . The episode directly follows ; recapping Kaze ' s apparent death , the dark pillar ' s appearance , and several minor events hinting at a motive of Lisa protecting the children . Lisa muses for a moment whether something " Is about to begin . " or that " Perhaps it has already begun " . Evacuation . Makenshi and Kaze ' s body have disappeared , and so the Comodeen use it as an opportunity to evacuate . Cid informs Lisa , Ai and Yu of a plan he has come up with ; the four of them can make it to the subway , as Cid can track its location thanks to Chobi ' s watch . Cid unveils Catherine ; a boat they will use to navigate underground canals , allowing them to reach the next subway station before the train does . He explains that Catherine runs on Elenium ; an energy found in the water of the Underworld . Knave and Miles bid farewell the party , leaving them with a large pile of supplies , which PoshePocket proceeds to half in one mouthful . The then party leaves , with Yu noticing that Fungus has his bag at the last moment . As they disappear off into the darkness , Crux is seen floating near the roof of the cave . Clash of Immortals . Meanwhile , in the Earl ' s throne room , the Earl and his lords are seen gloating over Makenshi ' s victory over Kaze . At Fungus ' s request , the Earl dispatches him , having returned to his full size , to deal with the Comodeen as he wishes . Back in the Canals , Yu voices his concerns for Kaze , having not witnessed his demise . At the moment a large crystal , similar to the bombs seen in the first episode , breaks through the roof , transforming into a sea - serpent . Fungus descends and attacks the group , giving chase as they flee . The scene cuts to reveal Kaze is unconscious , but still alive , somewhere in the canals . He awakens , and questions why the Magun didn ' t activate during his last battle . After a brief struggle , Cid pilots them over a waterfall , revealing Cathrine ' s gliding wings . Celebrating their escape , the group is surprised to see Fungus appear before them , with his sea - serpent . Cid crashes Cathrine into a wall , attempting to escape one of Fungus ' s blows . He becomes infuriated with the small amount of damage Fungus has dealt to the machine , and reveals a set of oversized magnetic hammers extending from his backpack . He quickly defeats Fungus with them , as Chobi ' s watch rings . They arrive at the Subway entrance , and quickly begin to climb . However , Cid decides to remain behind , to fix Cathrine . As they approach the station Fungus reappears , blocking their path . Just as he is about to attack , they notice Kaze nearby . Fungus attacks Kaze , while Ai , Yu , Lisa and Chobi race to the station . With the Magun now responding , Kaze decides to fire , despite the confined space . Summoning Ixion , Kaze appears to sacrifice himself to destroy Fungus , with Cid escaping on a hover bike like machine . The episode closes with the children , Lisa and Chobi aboard the train , wondering as to the well being of both Cid and Kaze . Soil . In this episode , only one combination of Soil is seen : The combination summons Ixion , a pegasus like creature which creates a destructive orb of lightning around itself . Characters . Returning Characters