Locket of Yesterday

[Mordenkaynen]

@ Maverick676
I can see a positive side of this in the fact that the threats nearly ignore counterbalance. However, the flows are obvious:
1) graveyard hate. Leyline, planar void, crypt, withered wretch, wheel,... The good point is that you fill the grave just before you play threats. That's why you can add tutor targets: o.ring and needle (and wan't be usless). Needle can be a dead-draw, o.ring hardly can.
2) then, comboes seem to rape you. With a single FoW in hand you are likely not able to stop them. With the locket (and Catalyst Stone also) you can try Sphere of Resistance (and may be Thorn).
Note: your threats are not faster than Dreadnaught so you have to understand that the main "Pro" is that you get multiples by playing speculation or intuition. O, yes, and once more, wurms and sometimes elephants ignore c-balance.

[e_hawk77]

the deck does seem to have some major flaws. Most notably that it has no way to deal with krosan grip. Maybe meddling mage or duress type cards should be added to the board or main. Also it seems like trinket mage could be a good addition. He can get many silver bullets and if you do splash black for duress or thoughtsieze you can play execusioner's capsule as another target. And lastly why is there no counterbalance? It seems like great way to protect the combo and helps against other combo.

[Captain Hammer]

Quiet Speculation is a strong and underrated card. Play UG or UGw.

You should play 1 Ray of Revelation and 1 Ancient Grudge as someting you could tutor with Quiet Speculation.

You should also play that Thirst for Knowlege clone but for lands rather than artifacts, so that you can discard cards in your hand with flashback to the yard.

And you should cut Enlightened Tutor because Locket of Yesterday is not good enough that you would ever want to tutor and lose a card draw just for the card. Play Brainstorms and such instead.

Play Tarmogoyfs, Force of Wills and if you play white, StPs.

Make it like thresh, but with Quiet Speculation to get you your non Goyf win conditions and to tutor for you artifact and enchantment destruction via Ray of Revelation and Ancient Grudge.

Here's a list of solid cards you can tutor with Quiet Speculation. It's basically like a 2cc Ancestral Recall where you get to pick the three cards that you draw (as long as they have flashback).

Deep Anaylisis
Roar of the Wurm
Ancient Grudge
Ray of Revelation

maybe also Call of the Herd
and Krosan Reclamation in the sideboard.

[rufus]

The Artificer's Intuition / Sensei-Sensei version of the deck probably wants to play Glaze Fiend and Salvage Titan.

How about LftL + Retrace instead with Oona's Grace, and Worm Harvest as a wincon.