Quote Originally Posted by theMonster View Post
After talking with someone in my playgroup, I'm considering testing Seal of Primordium in the K-Grip spot. Against Omniscience decks, you can put in Seal off their Show and Tell, never having to resolve it. Yeah, it doesn't beat an immediate Emrakul, but they don't always have it. It must be worse against DnT, though. You won't get them to sink mana into equipping Jitte with Seal on the table, so I guess Seal is worse for our tempo. Then again, you can possibly sneak it in under a Thalia, and they probably board out Revokers against us (but maybe not 'cuz it hits Hierarch). Flickerwisp can still save their Jitte, but on-board Seal instead of in-hand Naturalize makes it easier for them to set up that situation. I dunno, I guess it comes down to what you want to hedge against more.
Think Naturalize is the way to go these days if you want 2cmc artifact/enchantment removal. Seal of Primordium started picking up steam around the DTT era when Omnitell was the deck to beat for basically the reasons you listed regarding Omniscience and also because you could run it out earlier and make them think twice about putting Omniscience into play. These days though the artifacts and enchantments you want to destroy are more often lock pieces (Chalice, Blood Moon, Back to Basics) and less often win conditions so you typically want your Naturalize effects to be instant speed in order to minimize the window of time you give an opponent to respond.

I can only think of a few situations in which you'd prefer to have the Seal in today's meta game. Maybe against Miracles as an early hedge against Counterbalance or B2B, but overall the instant speed clause seems better than the ability to be proactive with artifact/enchantment hate.