The character is depicted as a human physicist who has been transformed into solid sound, and who wears a sonic emitter on his right wrist as a prosthetic device.

[4] The character is featured in other Marvel-endorsed products such as arcade and video games, animated television series, and merchandise such as trading cards.

Andy Serkis portrays Klaue in the Marvel Cinematic Universe (MCU) films Avengers: Age of Ultron (2015) and Black Panther (2018), and the Disney+ series What If...?

[6][7] Years later, Ulysses resurfaces with a sonic emitter/gun on his right wrist as a replacement prosthetic device for his missing hand, that can create any kind of object or creature he can conceive by only using sound.

[8] Klaw as a professional criminal battles T'Challa (who has now officially become the newest Black Panther) and superhero team the Fantastic Four in New York state, but he is defeated.

[10] Klaw would attempt to reform the second Masters of Evil to fight the Avengers, but his scheme would be foiled by the all-female team the Lady Liberators.

[11] Managing to escape custody again, Klaw journeys back to Wakanda where he helps steal a device capable of augmenting the metal-disintegrating property of a vibranium alloy.

Klaw agrees and after a skirmish with Ka-Zar in London, he travels with the Sheenarean to the Savage Land where there is a vibranium deposit large enough to create the portal.

After Ka-Zar repulses the invaders, Klaw flees into the Sheenarean dimension, and unable to salvage anything substantial from his allies, uses their technology to return to Earth.

Helping the Molecule Man find a body to possess, Klaw and his new ally travel to New York to wreak revenge on their common enemy, the Fantastic Four.

In Marvel Two-in-One #57-58 (Nov.-Dec 1979), Klaw is freed by fellow villain Solarr, although both are defeated by a group of heroes, including the Thing, Quasar, Giant-Man, and Aquarian.

[18] Klaw's career soon takes a downward spiral, after an encounter with the mutant Dazzler results in his humanoid form being dissolved and his sound energy being blasted out into space, where it ends up being collected by Galactus.

[23] When Earth's vibranium deposits begin to explode due to a 'vibranium cancer' introduced into the world when Captain America's shield was broken and improperly repaired,[volume & issue needed] Klaw travels to Wakanda with the goal of absorbing the sound energy of the imminent explosion to become even stronger.

The character ultimately resurfaces again, having (through unknown means) successfully uploaded his sound based essence onto the Internet and later been downloaded by the Wizard to fight the Fantastic Four again as part of a new incarnation of the Frightful Four.

[volume & issue needed] After Klaw became temporarily commingled with the ship of the cosmic entity Galactus and reconstructed by Doctor Doom, he became able to create semi-autonomous creatures that he could direct to attack his foes and his creatures are similarly made of solidified sound and display a similar superhuman strength level as Klaw himself.

He is also subject to temporary mild insanity when forced to exist as sonic energy without humanoid form for long periods of time.

As a result of his transformation, Klaw was at first unable to exist outside a medium that allows the propagation of sound waves (i.e. in a vacuum) without the technological improvements made to his sonic converter by AIM.

This version is an Afrikaner arms dealer and an old acquaintance of Tony Stark who was literally branded a thief after stealing Vibranium from Wakanda.