I’ve applied the Turbo Xerox rule to this shell. For every two one-mana cantrips, we should be able to shave a land. This deck plays four zero-mana cantrips (even better), as well as four one-mana cantrips that are particularly adept at finding lands early and ditching uncastables. On top of that, four of our lands tap for two mana, and four of our creatures benefit from built-in cost reduction that can lower their CMC to zero.

Agreed, my experience with Eldrazi suggests that 20 lands is at least three too few. I’m currently playing UW Spirits with 20 lands and it feels borderline even with four Vials and an average CMC of ~1.85.

And the first thing I thought when I looked at the list was “No Serum Powder? You’re dead to Blood Moon!” Serum Powder is a fun card, but not a very good one, and its corner-case value against Moon in a colorless-matters deck is one if ist prime selling points.

I definitely tend to favor land-light builds! Even with 1-2 more lands, the deck will have consistency issues — you can’t always draw Looting. But I’d wager that it (and other Looting-fueld midrange decks) would still have fewer of these issues than, say, Jund. We already run a Plains, but I can see fetchlands being fine here.

However, later during the testings, the deck felt way more unstable. It had some sometimes issues to find a good mix of threats or answers, even with looting, but usually that was fine. The main issue was concerning the manabase : the land count often felt too low to cast the bigger spells, even with looting, and the white sources were often missing. The deck felt terrible against Blood Moon as well. Still, when I could find the hate cards, combined with the fast clock, they definitely proved to be gamebreaker… but only with a white source.

So, moving forward, I would most likely consider adding a few lands for consistency, which we can just discard to looting if needed, and it would most likely be some fetchlands with maybe even a basic plains to fetch for if we fear Blood Moon of if one of our few white sources is removed by FoR or GQ.