Chamas Negras Mortais comes from Yu Yu Hakusho, where Hiei is one of the series' central fighters and is known for his black flame technique. In Portuguese-language versions, the attack's name is rendered as Chamas Negras Mortais, and the line has circulated among Brazilian anime fans through clips, edits and soundboards. Its staying power comes less from a single viral moment than from Hiei's enduring popularity and the instantly recognisable drama of a named attack being called out before a fight escalates.