Quiet and reserved, the king of the Inhumans of Attilan may not look it, but he is among the most powerful beings on Earth.
Normally used as a right of adulthood for Inhuman teens, Blackagar Boltagon received the gift of Terrigenesis as an embryo, manifesting powers of energy manipulation far superior than any living Inhuman. For 19 years he was sealed in a soundproof chamber, learning to manipulate electrons through the tuning fork on his forehead, and to suppress his "quazi-sonic" voice that could tear matter to ribbons before him.
His first month out of the chamber saw him to battle with his brother Maximus and the Kree, using his powers to win, but inadvertently killing his parents and driving Maximus insane. Black Bolt took the throne of Attilan at age 20.