Tomb of the Boom 1 2 3

Tomb of the Boom (トゥーム・オブ・ザ・ブーム) is the shared Stand of the Boomboom Family featured in Part VII: Steel Ball Run.

Appearance
Tomb of the Boom is a fairly small stand with a vaguely humanoid upper body. It has a small mouth with a long tongue, vaguely resembling that of an anteater. The top half of the stand's head is open, revealing an eye-shaped object inside it. Its lower body is a mass of human legs, with some disproportionately small, arranged in such a way that they resemble the legs of a crab; the amalgamation of many body parts may allude to the fact that it has several users.

Abilities
Magnetism: The Boomboom Family's Stand seems to have the power of magnetism. However, each member of the family uses his control over metal in a different way. The magnetism of the family is stronger when they are closer together, as well as when they are closer to their target.

Tomb of the Boom 1
Benjamin Boom Boom can let metal objects sink into his skin to replicate the appearance of another people, as well as increasing his defense. He can also spawn metal blades from his body after he let metal objects sink into it. Lastly, he can make Metal Objects shrink by removing iron particles from it.

Tomb of the Boom 2
Andre Boom Boom is the most powerful of the three, according to Benjamin. His ability allows him to turn any living being into a magnet by letting them touch any part of him, this includes a few drops of blood. He can magnetize several people as once and they, and the metal objects near them, are attracted to each other. This magnetism is so powerful that the victims' bodies will rip themselves apart.

Tomb of the Boom 3
L. A. Boom Boom is the most combat-oriented out of the three of them, and has the ability to manipulate Iron Sand, so he can immobilize his targets. He is able to attract small metal objects as well. Lastly, he is able to kill a person by manipulating the iron particles in their blood to suck out their blood.

Trivia

 * During the Boomboom family's battle with Johnny Joestar and Gyro Zeppeli, Johnny's gun fell apart, each part digging into him individually, whether this is an ability of the stand or something else entirely is unknown.
 * Along with Tattoo You!, Tomb of the Boom is used by multiple people.
 * The stand's name was revealed in the JOJOVELLER artbook.