Red-Matter Bomb

The Red-Matter Bomb, otherwise known as the Mother of All Bombs (MOAB), is an extremely powerful weapon designed by Martha Haseldonti during the Insurrectionist Wars. It is generally accepted by everyone in the Terran Commonwealth—and beyond—as the most devastating weapon in the United Nations Space Command's (UNSC) arsenal. When detonated, the bomb will produce a slipspace rupture that would consume anything within a ten-kilometer radius.

It is, by far, one of the most expensive weapons ever produced by the UNSC.