Chaosmaster Bomb
From MediaWiki

Grimlock's plan to destroy Jhiaxus' flagship, the Twilight, involved the Chaosmaster Bomb. Gigantic, spherical, and nice n' shiny, the bomb was adorned with a symbol that humans commonly use on radioactive materials. Grimlock was sufficiently impressed by its power to make a non-characteristic remark about its safety factor, but in the end the bomb never went off.
Whether the Chaosmaster Bomb was specially made, or a standard product available at better discount stores everywhere, was not made clear. It certainly has a catchy name.

