Unsanctioned is a set with cards with a silver border, that means they are not legal in official tournaments, concentrating the highest value of the set in full-art lands. The lands are beautiful and will be available in Arena!
It is a good idea to save 2,500 gems in the Arena because Wizards of the Coast will launch them next week, as pointed out by Redditor megaRammy.
These wonderful basic lands illustrated by Adam Paquette were featured in Unsanctioned and will be available in Arena for 2,500 gems after the March 12 update. There does not seem to be an option to acquire the set of land in gold, the in-game currency.
This is a high price for just five basic lands, from US$ 12,00 to US$ 15,00 in gems. Would you be willing to pay to have these incredible lands?