With the Temur Roar preconstructed Commander deck from Tarkir: Dragonstorm, you have a solid starting deck, ready to play right out of the box
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)
They're a creature type that brings constant aggression to the table: they want you to be attacking and playing proactively, and they will reward you for it
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
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