Whether its having all of the same art, foils, full arts, you name it, players love customizing their basic lands to fit their style
You can tap it down on your opponent's upkeep to restrict access to that color of mana if they only have one land of a certain color
While my speculations and predictions for their impact on various formats remain optimistic, I believe we havent yet seen the full extent of how many playables Duskmourn will offer
If you have Mycosynth Lattice and a free sacrifice outlet, you can also untap this card infinitely, gaining whatever benefits you get from sacrificing the tokens infinitely as well
Additionally, if you can get a lot of characters out fast, and a lot more once Be Prepared is played, you could very likely beat Ruby/Amethyst to the punch