@ De_LaBaiGa
no. Keter class is for SCPs that cannot be contained in any way, regardless of their lethality. I mean, a teleporting chair is a friggin' Keter
No, that is the new interpretation, since the creators left the project. Keter was originally reserved for any SCP that had the potential to cause massive damage. So it would need to be either hard to contain AND dangerous, or impossible to contain AND potentially dangerous. So many people argued about what was a Keter and what was a Euclid that the current SCP mods changed the definitions.