Stannis falls under the influence of Melisandre, a priestess of R'hllor who believes Stannis is the reincarnation of a legendary hero from her religion. After Robert's death, Stannis claims himself the true heir to the Iron Throne as Cersei's children are bastards born of incest. However, most of the Baratheon bannermen support the claim of the younger but far more charismatic Renly. Stannis confronts Renly and offers to make him his heir if he supports him, but Renly refuses, only using the negotiations as an opportunity to mock his brother, and intending to kill Stannis in battle the next day. Melisandre, who had seduced Stannis, gives birth to a shadow baby bearing Stannis' face that kills Renly, and many of Renly's bannermen immediately swear allegiance to Stannis. He then attacks King's Landing by sailing up Blackwater Bay. Stannis' force breaches the walls, but due to Tyrion Lannister's use of wildfire and the arrival of last-minute Lannister and Tyrell reinforcements, he is defeated. Nonetheless, he is convinced to continue fighting by Melisandre, and is further convinced by her magic as she shows him a vision of a battle in the flames.