NOVA Bomb

"'Dear alien bastards... We are in possession of the most powerful nuclear device ever to grace this beautiful galaxy. When detonated, it can destroy entire worlds. You've seen Concordia Dawn. Consider your choices wisely, Xeno scum.' — High Inqusitor Sivik Cobra"The NOVA is a powerful nuclear device created by the Imperium during the waning days of the Great Crusade. At maximum power, it possesses the ability to shatter entire worlds.

Design and Mechanism
The bomb consists of nine hafnium-based nuclear fusion warheads in an encased shell made out of an unspecified material. Within the design of a NOVA warhead is a red matter particle that collides with the bombs. When activated, the red matter is released from its container, allowing it to collide with the nuclear bombs; and the shell compresses and traps the blast within a fraction of a second, intensifying the blast and intensifying the blast yield by a thousandfold.