While its not especially powerful in constructed formats, this eight-mana artifact does very well in Commander, and as its only going to go up in price, more people have been buying it, leading to a 128.46% increase
On five, I will keep if my hand has two or more Urzatron pieces, defined here as Expedition Map, unique Urzas lands, and/or castable Ancient Stirrings or Sylvan Scrying
You want to attack with Squall alone, then use its damage trigger to recur two permanents (or the same permanent twice, if you can sacrifice it between triggers)
I cant pretend to know the sellers motivations for sure, but my suspicion is that these listings are set exorbitantly high for the purpose of creating a perceivable spike in price
Even with all the new cards I pulled from these The Lost Caverns of Ixalan packs, I still have more to track downand I cant wait to find them