I Just Want to Live - S1.E18

Thanatos finally gets serious after being wounded by Manigoldo. But even in the worst position imaginable, Sage doesn't falter. "Don't use the word despair so loosely", he says, and Manigoldo remembers his old days with his master and the desperation he felt when he saw the destiny of humans after death, regaining hope and determination to fight. The two use their Sekishiki Meikai Ha attack in a desperate attempt, and end up succeeding in separating Thanatos's soul from his physical body, but that isn't enough to defeat the god of death...