Ahura Boltagon is the son of Black Bolt and Medusa of the Inhumans. He was conceived without the permission of the Genetics Council, and born on Earth in defiance of this Council. His birth cry demonstrated his father's devastating power, but this evolved into a psionic "evil eye" power that could cause death. His powers were relatively dormant.
He was taken by the Council and sent to Earth, but his spacecraft crashed and he was taken in by a childless couple and named "Pope". He grew unnaturally quickly and it was in this period that his "evil eye" power replaced his vocal powers. After his rescue by Gorgon and Karnak, he was taken by the Genetic Council for the leader's own purposes. With the help of his family, Ahura was able to overcome the corrupt Chief Justice who had been stealing his power.
Ahura was locked away for years because he was afflicted with the same madness as his uncle, Maximus. As his powers grew, so did his insanity. The Genetic Council of Attilan deemed him too dangerous and he was taken to the Pacifiers to suppress his powers. They were unable to treat his mental illness. Black Bolt forbid Medusa to see him, however she visited him twice. The first time, Ahura chastised her for allowing this to happen to him. On Medusa's second visit, it was discovered that years with the Pacifiers had taken away Ahura's anger and violence, but left him in an over-sedated state. Medusa asked permission of Black Bolt to use their niece, Luna, to attempt to heal his mind, but Black Bolt flatly refused.
He was later captured along with Black Bolt by the Skrulls, but escaped unharmed with help from the rest of the Inhumans.
When Attilan was stormed by Thanos as he was looking for his secret son hidden on Earth, Black Bolt evacuated its inhabitants by using Eldrac. After Attilan fell, the Inhumans scattered were found, except Ahura. He had been teleported to a century into the past, where he had encountered Kang, who took him under his wing.
When Black Bolt managed to find Ahura, he submitted him to Terrigenesis, and made a deal with Kang to take his son to the timestream, so in case the universe died as a consequence of the Incursions, Ahura could live.
Hypersonic Scream: Initially, Ahura possessed a hypersonic scream, in a manner similar to his father.
Evil Eye: Later, Ahura's power has evolved into a psionic "evil eye" which can cause death, but this is largely dormant.
Telepathy / Limited Mind Control: Apparently Ahura possesses telepathic powers for limited mind control. The full extent of this power is unknown and it is unknown if he can use his telepathy for other actions besides mind control.
His existence seems overlooked in the Son of M series: Crystal demands the Inhumans go to Earth and retrieve her daughter, Luna. Medusa and Black Bolt refuse to intervene, to which Crystal bitterly retorts they would understand if they had children. Medusa then looks upon Crystal silently with contempt.
This apparent error was partially walked back in the follow-up series Silent War, which revealed Ahura had succumbed to madness and placed in a royal asylum, after which Black Bolt decreed no one could even speak of his son again. If intended, that makes Crystal's comment seem even more hateful, forcing Medusa to openly ignore her son's existence or else violate a royal decree.