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.
Not that you can because I 
have Judgment Arrows's power!
Falls dir das gegen mich gelingt, während ich
über die Macht Judgment Arrows’ verfüge.
Si es que puedes hacerlo
ahora que tengo a Judgment Arrows.
Agora você pode porque eu tenho
o poder das Judgment Arrows!