What is the rarest type of SCP?

Could you elaborate on the term "SCP" for me, as it's not immediately clear what you're referring to? Assuming you're referring to a concept from a specific fictional universe or franchise, let's approach this question from a hypothetical standpoint. In the context of a fictional universe where SCPs, or Secure, Contain, Protect objects, exist, the question of what constitutes the rarest type of SCP would likely be highly subjective and dependent on various factors. Some might argue that the rarest SCP would be one that possesses unique or unprecedented abilities, such as the ability to manipulate fundamental forces of the universe or defy known laws of physics. Others might contend that rarity is determined by the scarcity of instances or the level of secrecy surrounding a particular SCP, with those that are known by only a select few individuals or organizations being considered the most elusive. Ultimately, without more context or specificity, it's difficult to definitively state what the rarest type of SCP might be. However, it's likely that such a determination would involve a consideration of the SCP's abilities, scarcity, and the level of danger or threat it poses to humanity or the world at large.