From Duskmourn , Hushwood Verge might improve the mana base, allowing you to cast Llanowar Elves and Elvish Mystic on turn one and then tapping for white mana later
Also interesting is the addition of Munkidori to the deck
You get a full field of token clonespure value and spectacle in one die roll
Like most Magic: The Gathering cards, the value of Mishra's Workshop depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Antiquities)
At that cost, you probably wont be able to start blowing up on the same turn he hits the field, unless youre got a Chrome Mox up your sleeve
This makes the stacking theory much more credible, never knew they looked like that up close