You've got a whopping 12 cards costing 4-or-more, but even worse is that most of those cards cost 6-8 mana
The Redditor posing the question suggested one way of pulling off this silly death combo: Enter the Infinite
However, if it leaves the battlefield once its ability has triggered, that ability will still counter the spell
That said, you would get to cast him again, allowing you to reanimate something else
If you do manage to transform Mishra, which is doable given the amount of tutor effects you can use to grab the Dragon Engine, the back half is a great reward, serving as a colossal multi-tool that can solve nearly any problem youre facing
You might be desperate to increase how much removal your EDH deck has, but this is not an efficient form of removal, not even close