The transformation of Blake to Kamen Rider Cross-Z took a total of 8 seconds to complete leaving the man encased in a mostly dark blue armor with a distinctive dragon motif. The left gauntlet of the armor had an orange flame design, the same going for the vest on its torso, which contrasts with the right gauntlet and pants being both black and blue. Many of the other Kamen Riders in the room remained seated, each one of them in shock of the sudden transformation indicating Blake's decision to rebel against the UFE. Dan stood firm and unphased and merely turned his head towards Rose and stated, "Rose assist Tyler in apprehending Cross-Z". Rose nodded, attached her Sengoku Driver to her waist, pulled out her Melon Lockseed, and pressed the switch on its side to unlock it. Once unlocked, the Melon Lockseed announced, "MELON!", and an unzipping sound occurred above Rose's head with a metallic melon-shaped object descending from where the sound came from. Rose quickly attached the Sengoku Driver to her waist and locked the Melon Lockseed into its respective position on the driver, which elicited the belt to yell "LOCK ON!" Rose then slammed the Cutting Blade across the lockseed.
SOIYA! MELON ARMS: TENKA GOMEN!
The melon-shaped object above Rose then slammed onto her head and in an instant, she was covered in white armor with black scale designs on her upper arms and below her knees. Within the giant melon, Rose's head became covered with a white helmet with a golden crest above its eyes. The melon then opened and became green armor that covered Rose's chest, shoulders, and the top of her back. Rose then held up her hand which generated the Melon Defender, a shield inspired by the melon fruit, and pulled out her Musou Saber.
Everyone's attention fell upon the ensuing conflict occurring amongst the three transformed Kamen Riders. Both Kamen Riders Verde and Zangestsu focused on Cross-Z, leaving Andrew unwatched. While remaining on the floor, Andrew took the time to notice the reactions and expressions of everyone who remained seated amidst the growing chaos. Some of them wanted to assist Verde and Zangetsu against the newly pronounced traitor, whereas some of the others were uncertain of the best course of action for them to take. Dan took a moment to strategize on the smartest way to apprehend Cross-Z; he knew a huge display of force could tempt some of the other Riders to sympathize with the traitor and rally more to Jason's cause, but he was also aware that if he simply forgave Cross-Z for his actions he, as a leader, would appear weak. Dan lifted his head and stated, "Geoffrey stay with Rose and Tyler and help them if things get out of hand". Dan then turned his head to Andrew and said, "I am willing to forgive your insubordination if you assist in the apprehension of your comrade". Andrew turned his head away from Dan and said nothing. Dan's response was a slight chuckle followed by, "Everyone in the room not participating in this mess leave and follow lockdown procedures". Quickly, everyone minus the 5 Riders in combat ran out of the Mission Control Center. As Josh and Celina were leaving, Dan grabbed onto their arms and ordered, "Josh, get into contact with Sasword and your Shadow unit to surround the compound. Celina, get the rest of your 3WA and 5 dozen Riottroopers outside to join Josh". Both Riders nodded and ran off to accomplish their objectives.
When most of the Riders left the room, Geoffrey ran over to Andrew and offered him an arm to pull him up. Andrew accepted the gesture and was pulled up, but Geoffrey could tell by the look on his face that a simple conversation would not be enough to change Andrew's mind. "I can't control your actions", Geoffrey stated, "but I am asking you to be very careful, because if you go against us, there is no coming back". When Geoffrey finished his statement, he pulled up a chair and took a seat. Chills were felt down Andrew's spine; "Geoff always seemed like an easy-going kind of guy. I guess in a time of conflict, we all show our true colors", he thought to himself. Meanwhile, Kamen Rider Cross-Z held out his hand which summoned his Beat Closer and took a defensive position. Verde simply took the Clear Vent advent card from his advent deck and slipped it into the card reading visor on his left thigh. Once inserted into the visor, the visor itself shouted, "CLEAR VENT!", and Kamen Rider Verde seemingly vanished without a trace. Cross-Z was stunned at first but remained focused, thinking to himself, "Verde's armor looks like a chameleon, which means that he must have some of the animal's properties, like blending in with the environment". Kamen Rider Zangetsu took this moment to take advantage of Cross-Z's moment of confusion and began to slash her saber across his chest; however, before the Musou Saber contacted its target, it was blocked by a light blue bow with a lime green train inside of it. Zangetsu turned her head to face the direction where the intercept originated and became temporarily deafened by Kamen Rider Build's driver's announcement sound.
TEIKOKU NO HANGYAKUSHA! KAIZOKURESSYA! YEAHHH!
Not wasting a moment of Zangetsu being caught off-guard, Build slammed the side of her stomach with his left arm containing the Train Gauntlet, causing her to stumble backwards for 10 inches. "Thanks for the save", Cross-Z said gratefully. Build responded, "No problem, but right now we need to get out of here now. Um…where's Verde?" The dragon-inspired rider began to spin in a circle saying, "I think he's hiding, waiting for the best moment to atta…" Cross-Z then dropped his weapon, grabbed his throat, and made choking noises. "Blake!", Build yelled but he soon found himself smacked on the side of the head by Zangetsu's Melon Defender. "This may seem a little late", Zangetsu began, "but you're under arrest". Cross-Z, knowing that if he kept getting choked he would surely pass out, decided to make the educated guess that Verde's hand was encasing his neck and managed to grab it and pull it over his head, flipping the invisible rider onto the floor. As Verde gradually became more visible he leapt into the air, landed on his feet, and pulled out another advent card to put into his visor. "HOLD VENT!", the visor yelled as Kamen Rider Verde's weapon of choice, the Bio-Winder, came out of Mirror world and into his hand. Verde, however, was the least of Cross-Z's problems as he now saw that Build was in danger. With a few turns of his driver's lever, Kamen Rider Cross-Z prepared his finisher.
READY, GO! DRACONIC FINISH! YEAHHH!
A Chinese dragon made up of blue energy coats Cross-Z's right hand as he prepares to attack Zangestsu with a Rider Punch. Zangetsu quickly holds her Melon Defender in front of her and turns to face Cross-Z. Kamen Rider Cross-Z then runs toward Zangetsu, leaps forward, and lands the punch on her shield. The impact of such a punch, not only sent her flying back a few feet, but also rendered her unconscious and back into her normal human form.
At that point, Geoffrey ran over to Rose to try and wake her up, but when he failed to do so he decided that he had seen enough. The young man rose from his seat and pulled out a rather large orange lockseed and pressed the switch on its side, "KACHIDOKI!". Both renegade Riders turned to face Geoffrey as he attached the Kachidoki lockseed to his Sengoku Driver and sliced the cutting blade.
LOCK ON! SOIYA! KACHIDOKI ARMS: IZU SHUTSUJIN! EI! EI! OH!
Kamen Riders Build and Cross-Z now stood before Kamen Rider Gaim in one of his most powerful forms, Kachidoki Arms. "You're done!", Gaim yelled as he pulled out the two Kachidoki Flags from his back. Acting out of pure adrenaline and the pure excitement from the situation at hand, Kamen Rider Cross-Z picked up his Beat Closer and charged at Gaim. Unfortunately for Cross-Z, Verde managed to swing his Bio-Winder across both of his legs, tangling Cross-Z and causing him to fall. As Build was taking in his surroundings, he realized that both he and Cross-Z could not beat the two other Riders in one-on-one fights. The best option for the duo was to escape the Mission Control Center and lock Gaim, Verde, and Rose inside. While trying to dodge each of Gaim's attacks, Build kept getting distracted by Cross-Z's screams, which were caused by Kamen Rider Verde whipping his Bio-Winder across his back. Acting quickly, Build turned his body to face the screams and aimed his Kaizoku Hassyar (the bow with the green train) at Verde and pulled back the Build Arrow (the green train). The announcements for the finisher began, "KAKUEKI DENSYA! KYUUKOU DENSYA!" but was suddenly cut off as Gaim kicked Build right in the middle of his back. Fortunately, the charge of the Kaizoku Hassyar was enough to fire three balls of energy, two of which landed successfully on Verde. The amount of strain brought on by the conflict in the Mission Control Center weakened Verde to the point where he returned to his human form. Tyler then fell to his knees and landed in a state of unconsciousness. Cross-Z leapt back on his feet, picked up his Beat Closer, and stood next to Build. "Okay, what's next?", asked Cross-Z. Before Build could respond, Gaim pulled out his DJ Gun and said, "This is what's next". Gaim turned the dial on the gun to the low setting, causing the music playing from the DJ Gun to be slowed down. The Kamen Rider loyal to the UFE then took a shot at the two riders who were standing side by side. Since the setting of the DJ Gun was on low, the shots from it were cannon-like, which caused the armor on Kamen Riders Build and Cross-Z to be inflicted heavily with damage. By some miracle, the two renegades remained conscious and in their armored forms. Cross-Z landed next to Tyler and Build next to Rose, causing Gaim to hesitate shooting his weapon out of fear of hurting his friends. Both Build and Cross-Z took note of this and remained standing in their current positions. "Move Dammit", Gaim thought to himself. Suddenly, Build moved his Kaizoku Hassyar in front of him as if to use it, and Gaim, knowing that it is dangerous to fire back, dropped his DJ Gun and prepared to pull out his own Musou Saber to deflect the predicted blast. However, it was all part of Build's trap. As soon as Gaim dropped his gun, Cross-Z performed a front flip over Gaim's head and landed by the entrance/exit to the Mission Control Center. Build followed by performing a side roll to get closer to the door and swiped his Kaizoku Hassyar across Gaim's legs, knocking him to the floor. Quickly, Build exited the room and Cross-Z followed, but not before activating the door to close and smashing the control panel, leaving Gaim locked in the room with the other unconscious riders.