[Theorycraft] Shadow of Death / Leeroy Jenkins OTK deck

So I had an idea on how to make a Standard OTK deck by using discounted Shadow of Deaths to fill the board with copies of Leeroy Jenkins.

• Play a Novice Engineer and Shadowstep it.
• Draw Leeroy Jenkins, Myra's Unstable Element, both copies of Shadow of Death, and both copies of Preparation.
• Use Myra to draw the rest of your deck.
• On the next turn, play Leeroy and use both Preps to cast both Shadow of Deaths on him.
• Use the Shadowstepped Engineer to draw and summon 5 additional Leeroys

What do you think? Are there better ways to pull off the combo (in Wild, Emperor Thaurissan would make this a whole lot easier) than what I have? And I don't know what to do with the rest of the deck, so any suggestions would be appreciated.