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.
...to Special Summon Armatos Legio 
Segmentata and Gladius next to Centurion’s link!
um Armatos Legio Segmentata und Gladius
mit Centurion gelinkt spezialzubeschwören!
e invoco a Segmentata y Gladius
como enlaces de Centurion.
para invocar o Armatos Legio Segmentata
e Gladius próximo ao link do Centurion!