To quote wikipedia about the Nullifier:
"First appearing in Volume 1, Issue #50 of the Fantastic Four comic book, the Nullifier has the ability to completely and utterly eliminate any target the wielder chooses, along with the wielder himself. While its origins are ancient, alien and unknown...
I dig Ultimate Doom. He's definitely a change of pace. Took me some getting used to in the first Doom arc, but by the time I saw the cover for 30 I was sold. Can't wait to read it.
I thought the backstory was interesting enough.
I've never been much of fan of JRJ's artwork(I only really like when he works on Spider-Man), but nonetheless I was entertainted.