This is simply a boss idea for when the core is opened. Once the core is opened, I would imagine it as a bright light filling the terminal, then a weird force pulling you in, then the core would close. You would end up in the first level. I will start it now.
NOTE: This will seem very difficult, as this would essentially be the end boss of spiral knights!
Level 1: The Core: Entrance to the Core: Level Design: Unknown Passage combined with Clockworks Tunnel. 2 Arena's, 1 Monster Zone.