Massacre during the Class Excursion.
It was a fixed event in the game — meaning no matter which plotline I chose, no matter what decisions I made to change the story…
It still always ended up happening.
Sometimes, the protagonist was too late to stop it.
Other times, he was simply too powerless to do anything.
Each time, the result was the same.
Destruction.
Complete apocalyptic destruction.
Sure, there were different ways it could play out — but the triggers leading up to the event were almost always the same.
It would usually start with Samael discovering the Summoning Card of the Seventh Demon Prince.
The whisperer of temptations.
The dealer of desires.
Asmodeus.
With the Demon Prince's guidance, Samael forged a unique set of self-destructive Spell Cards.
Then, he used Asmodeus' voice to mind-control several Cadets.
Finally, during the class excursion to the Night Sanctuary, he ordered his puppets to activate the Spell Cards he'd given them.