Because Legacy doesn't have Mox, Mox, Mox, Mox, Mox, Lotus, Sol Ring, Mana Crypt, Metalworker, Vault-Key, Triskelion, Karn, Ravager in every second deck you face.
You have to notice that Null Rod's role in Vintage is to cut down the opponents resources, while it just doesn't do anything useful in Legacy. In every case, Pithing Needle is superior to Null Rod.
Well, every single target you mentioned are - along with many more - each one more reason to play Needle over Null Rod. Plus, Pithing Needle is less clunky.Quote:
But I have to say that although the rod nullifies (pun intended) the most troublesome artefacts in the format, it lacks the versatility of Pithing Needle which is able to hit: Survival of the Fittest, Elspeth and Man Lands in particular. Other than that, it is worth testing in my opinion.
The only deck that gets assraped by Null Rod is Affinity (because it's the only deck which gets it's resources shut down by Null Rod obv.). And Affinity is not competitive anyway and I believe the M10 rulings brought the coup de grace to it. I won't say that Affinity isn't played, no, I also got lucked away by it 1 or 2 times, but this single deck shouldn't be a reason to play a card that is quite narrow in Legacy.
I just see that Null Rod might have a justification in the non-LED Dredges because it shuts down the 2 problem-artifacts at once (Relic and Crypt), ensuring that you don't get pwned by Murphy's Law (seriously, use Needle naming Relic and you will lose to Crypt, name Crypt and you will lose to Relic. I'm one of these unlucky guys).

