B't X, el Guerrero y su Máquina: Temporada 1, Episodio 19

X is dying, and now the strongest of the Dark Knights, Mira, shows up to stop them! Teppei fights back with his Messiah Fist to try and keep X out of it, but X wants no part of it and attacks on his own. Only united do they stand a chance, and Teppei rejoins X. They use the Prism of Aura at full power and stop Mira, but it uses everything X has left.... Episode summary graciously provided by Vortex Fansubs.

ビート・エックス Bīto Ekkusu btx B'T X B'tX