Definitely not tracking. You just really want to open Urborg though. Smallpox lets you sacrifice/dump extras, and you can also pitch them to Lili. So far having more Urborgs never loses me the game, but missing the first one can.

I love Looting in general, but in decks that can benefit off the grave dump, it’s superb. I don’t usually run it in my Pox decks because it makes the mana miserable. Trying to support Looting, Pox, and Flagstones in one deck stretches us very thin, and makes us too soft to land destruction IMO. You also risk delving too deep into graveyard synergies at that point, so Rest in Peace & co. become great against us as well.

Going all-in on the land destruction plan can be fun, and I’ve tried it a few times. It’s good in some matchups, but super weak against anyone proactive. If opponents stick an early threat (or, God forbid, two), we just lose. Land destruction spells are also pretty weak in the late-game; Smallpox itself sort of has this problem too, but it’s passable since it still kills creatures. It also asks a lot of the deck. Often we can’t cast BB on turn two for value and have to wait until turn three (i.e. with a fetch), which is too late most of the time. Easy to draw the wrong pieces at the wrong time.

That, and I don’t want to overcommit into a single angle of attack. I’d rather run more ‘walkers as three-drops since LtlH helps address certain issues the deck has and pressures opponents from a unique angle. There are few effective ways to remove a PW in Modern, while answers to Lingering Souls abound.