Afromigrants are one of the main groups of asylum seekers and refugees in Brazil since 1990. Until then, they were practically totally absent from the migratory horizons in the country. Asylum has therefore represented one of the main categories to widen their means of travel, entry and stay in Brazil. Despite that, there have been no studies which discuss in depth the impacts of racializations and racisms in the development of the institutional and procedural asylum systems in the country, their effects in afromobilities to and in Brazil, as well as in the procedural experiences of black asylum seekers. With historically antiblack migratory practices and policies, this research seeks to therefore discuss how the principle of race and antiblack racisms are translated throughout the years in Brazil, including in the establishment of a category considered humanitarian. Drawing from the concepts of antiblackness and the afterlife of slavery, this study focuses on the identification and deepening of the understanding of techniques and technologies applied in the context of the asylum/migration system, which continue to racially demarcate the (un)desirability of certain immigrants and refugees in comparison to others, especially considering the black/non-black divide. This research is the result of an ethnography conducted during 2017-2019 whose object were the interactions between asylum elites and myself, as I have acted as a refugee lawyer in Rio de Janeiro in that period. The ethnography, along with documentary analysis of primary and secondary sources compose the main analytical structure of this study, which demonstrates the importance of antiblackness to understand the genesis and development of the institutional responses of the migratory/asylum system concerning afromigrants. Continuities of antiblackness in the management of foreign black bodies to and in Brazil demonstrate its reach even in the asylum system, which is, in itself, an inheritance of the colonial world and embedded in it and, therefore, also (re)productive of the antiblack division of Humanity. Rethinking modes of existence able to overcome the intrinsic and founding antiblackness of national and territorial borders and its derivative categories is thus only possible in a world where there is a demand for the end and destruction of these same borders.