"Crueldade de Severo" refers to a series of disturbing videos and content created by Renan Prado and his associates, which were uploaded to the dark web. These materials depict extreme acts of violence, including tortures, mutilations, dismemberments, and deaths of children and elderly individuals. The content is often available for free or can be purchased, and it also includes pets as targets. The videos are part of a broader network of shadow groups and their allies, who share and distribute this type of content. Renan Prado, along with other individuals, has been involved in the creation and dissemination of these horrific materials, which have gained notoriety within certain dark web communities.