Automatically having trample is huge, and the incidental buff saves you the trouble of having to put a Thran Power Suit on it
If you cast the first Shock, then respond with the second Shock before Imminent Doom's first trigger resolves, it will trigger twice
Now, that deck has another powerful finisher, even if Tezzeret was cut a while ago
Fast mana from Sol Ring, Ancient Tomb, Skirk Prospector, and Jeska's Will help you to cast key pieces early, while Lightning Greaves, Swiftfoot Boots, and Thousand-Year Elixir make sure that Krenko can tap right away and survive removal
Quintorius Kand and Urianger Augurelt give you a little life for playing cards from exile, are enablers on their own, and have utility outside of those effects
Lefty cards are coming for our #LeftyWizards Tag your lefty friends and play backwards for once to see how it feels