According to simulations run on different futures of Ignis and humanity, Revolver says that Lightning's is the only one that leads to mutual destruction.
How he deals with it will 
determine who wins this duel.
Wie er damit zurechtkommt, wird über
den Ausgang dieses Duells entscheiden.
Lo que suceda con esa carta
decidirá el duelo.
Como ele vai lidar com isso
determinará o vitorioso do duelo.