I am all for proxies, as I have witnessed local metagames being skewed by hordes of WW... Being forced to choose deck based on whether or not it can take down WW is in my mind very format distorting...

I dont think Fact or Fiction belongs, especially if you are not running Gilded Lotus, which i definitely think should belong as well.

Four mana is a lot, and when you already have a full set of Draw 7's + Four Thirst of Knowledge + Ancestral, I think that Fact might be overkill. You should have a lot of cards in hand which you would rather spend your mana on.

Also, is Trinisphere really that much better than Blood Moon? Trinisphere only locks out your opponents early plays, mostly relevant against Aggro. Yes, Control has some early plays as well, but the difference is that they can actually afford to pay three mana for a Force, where you can't.

Blood Moon seals the game when it comes down, they are completely helpless until they get that Island, if theyre even playing it. Note that this happens regardless of when you play it (Assuming fairly powered metagame) I would much rather keep Sphere in sideboard for those Aggro matchups, where it will be more relevant.

Assuming that you have tested Windfall, was it really that bad for you? Considering that you want to cut Thirst, I dont think you want to go down two card drawing slots, and the one Mindslaver is a bit random in my opinion. Possibly cut them for Windfall and the last Tangle instead?

Of course, my first reaction was to try to find something to cut for the last two Thirst instead, but the decklist appears rather tight, especially since your testing shows that Worker is solid gold. Possibly cut one Greaves? I love Greaves, having played President Bosh for a while. but they are rather useless in multiples. What are your thoughts?