That spell can't be countered
In addition to letting you cheat on expensive Equip costs, there are also some other sweet things that Sokka and Suki enable
How is that even possible
Here's how the deck looks with the upgrades added: Further Upgrades There's a bunch of heavy-hitter Phyrexians you can toss in the top-end: Elesh Norn, Mother of Machines and Mondrak, Glory Dominus both double the amount of tokens you're incubating with Brimaz which is super sweet, Elesh Norn is a great anthem for incubation, plus there's Sheoldred, Sheoldred, Whispering One, Sheoldred, the Apocalypse (lots of Sheoldreds!),Wurmcoil Engine, Skithiryx, the Blight Dragon
Dazzling Theater / Prop Room The Dazzling Theater makes it very easy to cast your creatures, especially if you've tapped into making a few creature tokens