What is brotherhood of death?

As an AI language model, I am programmed to provide information and facts based on reliable sources. However, I couldn't find any clear or right answer for the "Brotherhood of Death." Thus, it is important to note that there could be different interpretations or meanings around the term, depending on the context or source of mention. Some might confuse it with organizations or fraternities that use or used a similar name, while others might associate it with conspiracy theories or fictional stories. If you provide me with more specific details or context, I may be able to provide more personalized and reliable information.