@KuroInfinity and again, Keter is for SCPs that cannot be contained regardless of a consciouness being there or not. Why would you think this to be an Euclid
Reminds me that movie where started in black and white and some influence started to change that place and color slowly emerges by the end of the show.
the rank is how hard something is to contain, not how dangerous it is.
there are things with the "safe" class that could ( and have in some cases ) kill all of humanity.
for example SCP-2207 is "safe" but have the ability to destroy the universe.