[quote=@Mega Birb]
[@KoL]
Isn't literally everyone in the Machina armed with a self-destruct button for this type of situation?
[/quote]

For all intents and purposes, dying inside Hohenheim's castle respawns you into her captivity rather then your faction. This challenge is more dangerous then others because suicide is a one way ticket towards capture once you are inside the front door.