Since I've finished my big Tuesday Night Eternal run with this deck (2nd place with it, which is impressive...), letme explain this deck and how it differs from the standard old Elysian setup in Expedition.
This deck, like the Elysian variations before it, focuses on having positive tempo, drawing up units hit by Inspire, and otherwise disrupting your opponent's plays in a variety of ways. At least, that's what the tempo decks plan on doing. While this deck can also do that (not quite as well), it also has another plan: the long game.
Woda, Grodov's Listener is one of the main changes, and makes wild and utterly ridiculous things happen. You would think a 12/12 Varret the Wise with Endurance and Exalted would be unanswerable with this deck. You would be wrong, given the right selection of cards. A well-placed surprise Mute or Striking Snake Formation just generated can really screw with the opponent's plans.
The Praxis Arcanum is the other really big change, which is one of this deck's biggest avenues into smashing holes into control decks... by giving your big units charge and Deadly. Talir herself just serves as a giant beatstick, and if you get to the power necessary for her, the opponent is probably long since gone.
Storm Lynx is a replacement for Varret, and really, you don't
need him around always. It's a better dump on aggro, especially if they think you're stuck on power.
Lastly, the market is also different.
Waystone Fragment and
Crystallize are both devestating win conditions to control decks, with the former making even the little wisp dorks off of the spellcraft threatening (it pays to be patient with it at times) and the latter just throws unit-based control such as cultists right into the line of fire... by every one of your big units. It's a classic finsher for a reason, and it slots well here, too..