The Ultimate Nullifier is capable of destroying any target the bearer directs the Nullifier at. If the bearer lacks the proper control, concentration, or power then the Nullifier will destroy the bearer as well and possibly the universe itself. While the origins of the Nullifier are largely unknown, it had been revealed that the Ultimate Nullifier is an aspect of Galactus himself. It is the only known object known to inspire fear in Galactus.
Ultimate Nullifier (Marvel) – Weapons
Fantastic Four #50 – The Startling Saga of the Silver Surfer released by Marvel on May 1, 1966
First Appeared Fantastic Four #50
The Silver Surfer takes on Galactus in an epic battle! Meanwhile, Johnny has received the deadliest weapon of all time–The Ultimate Nullifier!