The market rate for these cards changes over time
To test my theory, I proxied Clinton Whitehurst's deck from the previously linked article, goldfished it a few times, then switched the Charms for Erasure and the Schemings for Briefing
Being able to move those key elements from one format to the other can be challenging, but Wizards of the Coast has put a lot of work into ensuring this is a seamless transition
Tap it for Earthcraft and untap another land
Just two in the X, which is 6 mana total, would be a 2d6 large monster around 7/7 on average, and it gets bigger from there
And, if youre looking for more ways to make mana and get rid of those tokens during combat, then Warren Soultrader is the one for you