while searching for and finding his stepmother Ramonda, the Panther contends with South African authorities during apartheid. T'Challa eventually proposes and becomes engaged to Monica Lynne, though the couple never marry. Years later, the Panther accepts a Washington, D.C. envoy, Everett K. Ross, and faces multiple threats to Wakanda's sovereignty. Ross assists him in many of these threats. In gratitude, the Panther often risks much for Ross in return. The first threat he and Ross encounter is "Xcon", an alliance of rogue intelligence agents backing a coup led by the Reverend Achebe. Afterward, Killmonger resurfaces with a plot to destroy Wakanda's economy. This forces T'Challa to nationalize foreign companies. Killmonger then defeats him in ritual combat, thus inheriting the role of Black Panther, but falls into a coma upon eating the heart-shaped herb—poisonous to anyone outside the royal bloodline, which had a hereditary immunity to its toxic effects. T'Challa preserves his rival's life rather than allowing him to die. Later, T'Challa finds he has a brain aneurysm like his alternate future self, and succumbs to instability and hallucinations. After his mental state almost causes tribal warfare, the Panther hands power to his council and hides in New York City. There he mentors police officer Kasper Cole (who had adopted an abandoned Panther costume), an experience that gives T'Challa the strength to face his illness, reclaim his position, and return to active membership in the Avengers, whom he helps secure special United Nations status. Marriage and passing the mantle T'Challa recounts the story of his ascension as the Black Panther in the fourth volume of his eponymous comic book series. He defeated his uncle during the Black Panther celebration, and during his walkabout when he met and fell in love with a street urchin named Ororo in Cairo, Egypt. Unbeknownst to him the US government is planning a coup to get access to the vibranium. They allow Klaw to recruit a team of villains to support his totalitarian neighbor, Niganda. Klaw recruits Rhino, Black Knight, Batroc the Leaper, and Radioactive Man to lead the invasion. The US government then deploys an army of Deathloks to "support" T'Challa and justify an invasion, but T'Challa kills Klaw, and Storm wipes out the Deathlok army in a hurricane. T'Challa then helps his old flame Ororo Munroe reunite with her surviving family members in Africa and the U.S. Shortly afterwards, he proposes and the two