After mourning the death of Ikki, Shiryü and Ryühö face off against Rhea. Fighting alone, Shiryü shows Ryühö his strength before being defeated by a hidden attack from Rhea which pierces his Gold Cloth, leaving Ryühö to fight alone. Being easily outmatched by the Pallasite, Ryühö suddenly burns his Cosmo and surpass the Seventh Sense, almost defeating Rhea. However, he collapses before that due to the massive amount of energy he used. Shiryü, revealing that he allowed Rhea to take him down in order to evaluate Ryühö's Cosmo, easily kills Rhea with his Rozan Rising Dragon. Later, after having recovered from the battle, Ryühö realizes that he managed to awaken a portion of the Omega during the fight.