Do or Die

Do or Die is the seventh episode of Kamen Rider x Mai-HiME x Mai-Otome: Legend War feat. Super Sentai Red Heroes. It is the third and concluding part of the World of S.ifr arc, focusing on Ryuki, Wizard, Kiva, and Double, while regrouping with Decade, Gaim, Kabuto, and Drive after their mission on the World of the HiME; and this episode culminates the Kamen Riders facing the Five Columns for the protection of Sifr Fran.

Synopsis
Lena Sayers having unlocked the power of the Blue Sky Sapphire GEM, destroys the android M-9 with the help of Shinji, Haruto, Wataru, Shotaro, and Philip, and subsequently rescued Sifr from Schwarz. Unknown to Lena, the Five Columns were plotting to assassinate Sifr; upon learning this, the Riders are determined to risk their lives to defend Sifr - only for the odds to be even when Tsukasa, Shinnosuke, Tendou, and Kouta arrive.

Advent Cards

 * Cards Used:
 * Sword Vent, Survive Rekka, Ryuki Survive Final Vent
 * Weapons/Powers Summoned:
 * Drag Saber, Drag Visor-Zwei, Dragon Firestorm

Rider Cards

 * Cards Used:
 * Kamen Ride: Decade, Kuuga, Fourze, Shocker Riders (x6), Riotroopers (x5), Psyga, Zangetsu, Meteor
 * Attack Ride: Launcher Module, Net Module, Invisible, Remote
 * Form Ride: Fourze Elek
 * Final Form Ride: Ryuki Dragreder
 * Forms Used:
 * Decade, Decade Kuuga Mighty Form, Decade Fourze Basic States, Decade Fourze Elek States
 * Rider Card Summons:
 * Shocker Riders (x6), Riotroopers (x5), Kamen Rider Psyga, Kamen Rider Zangetsu, Kamen Rider Meteor