Black Bolt

Within Marvel Comics continuity, Blackagar Boltagon is an Inhuman born to the Inhuman Royal Family and exposed to the mutagenic Terrigen Mist while still an embryo; the Terrigenesis event and Kree experimentation on proto-Inhumans form the background for his altered physiology. He debuted in Fantastic Four #45 (December 1965) and was created by Stan Lee and Jack Kirby.

Sources identify Black Bolt as the silent ruler of Attilan and a member of the Inhuman Royal Family. The provided material does not supply a focused canonical physical description or costume details in the cited excerpts; his most-noted visible characteristic in sources is his habitual silence and the social practice of communicating via sign language or a spokesperson.

Black Bolt's signature ability is linked to the speech center of his brain: he harnesses electrons such that speaking triggers a massive, highly destructive shockwave capable of leveling a city. Narrative instances include overextending his sonic powers and causing a Kree vessel to crash, with associated fatalities and traumatic effects on others. Because of the extreme danger his voice poses, he has undergone rigorous mental training to prevent uttering a sound — even in his sleep — and normally communicates through sign language or a spokesperson. He is also depicted as the political leader of Attilan, exercising rulership over the Inhumans.