Aside from the far-reaching implications of these modal lands, the new party mechanic (which provides another application for Umara Wizard) promises to add another interesting consideration to deck-building, and landfall is always fun for the weight it adds to every land drop
As such, "Shadow Mist" can search "Mask Change" or "Mask Change II", then be used as the target of that "Change" card to Summon "Dark Law" or "Anki", netting additional advantage through its second effect to search any "HERO" monster from the Deck whenever it is sent to the GY if done during the subsequent turn
Then you can drop, for free, an artifact from your hand to the battlefield equal to less than your counter count
One of the perks is being able to open an additional pack per day
If youve played Magic long enough, youve heard of the Power Nine, and that public image is worth more than any game function