He finishes with this sentence: "Take that as an indication when you're in doubt, you're probably better off adding that extra land instead of that extra spell to your deck." I'm going to continue to advocate for 40 lands, because I feel being relevant in the game and having a deck which reliably casts its spells is superior to the alternative
The Dominaria United Bundle contains 8 Dominaria United Set Boostersthe best boosters to open just for funplus exclusive accessories, with 40 basic lands (20 traditional foils and 20 nonfoils), 1 Traditional Foil promo card with Bundle-exclusive alternate art, 1 oversized Spindown life counter, 1 card storage box, and 2 reference cards
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They are in the mainboard as a metagame call, maybe a wrong call, but if those effects aren't prominent deffinetly switch them with Rip Apart and Vanishing Verse
It does change the gameplan slightly to be more grindy and less explosive, but it was already heading in that direction
I think I have to be honest here before I begin that I played Magic: The Gathering religiously and competitively (The table top version) from 1993 with the release of the Arabian Nights until about 2006 just after the release of Coldsnap