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.
I return Decurion to my deck 
and Special Summon Centurion.
Ich hole Decurion zurück in mein Deck
Devuelvo a Decurion al Extra Deck
e invoco a Centurion.
Eu devolvo o Decurion do meu deck e
realizo a invocação especial do Centurion.