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Yes, yes it does.

What about Vela, the Night-Clad? Infinite life loss with Griffin and Food Chain out. The issue is obtaining the black when you're comboing out.

Priest of Gix springs to mind...

The two that spring to mind are Platinum Angel and Celestial Force. The main problems are that one doesn't actually gain you life, and the other one doesn't until the next turn.

If you need to replace the Cliques, how about Mystic Snake? It has flash, is a creature and has added utility for the deck.

If you're struggling with the Pierces because you're facing creatures, then Daze is pretty much the only one that's relevant. If it's because you need to counter nonpermanent spells, then there's...

And yet, if you're going infinite (and even when it's not, you can still follow the Gris chain to cast Rune, then use Rune to cast Gris).

Why would you ever consider Rector without sac outlets? That's a whole different deck. And as for artifacts/enchantments to search for, there's...not that much, really. A couple of artifacts that...

I think that the thing to consider is mana consistency, which the Cutter doesn't do without Food Chain on the board. I mean, sure, potentially getting that turn 2 Emrakul on the play sounds nice. ...

Hell, if you know your opponent is playing Thought Scour, you can put it third from top to dodge the Scour.

Is there any point at which you would use Kozilek over Griselbrand? Is Kozilek even a viable alternative?

That's an interesdting thought: Tyrant +Mistohllow+FC=empty opponent's board. Now, if only you could make all your creatures have flash somehow...

Could Ancestral Knowledge be a usable card for filtering purposes? I'm thinking about the combined Exile-selection and rearrange clause. The CU on it is a pain, though.

There's more than that: there's Cloudthresher, Conquering Manticore, Duplicant (which, I might add, keeps its CMC), Morselhoarder, Spitebellows, and Faultgrinder, just to name a few utility cards.
...

Okay, I didn't realise the Shaman existed, but do you think the ability on the Entity is better than the Trample all the time, or would it be sensible to play both as alternates?

Indeed: however, there are a number of X spells that fit the bill of OHKO for Food Chain decks, but one of them is Stifle-able and the other has a teeny-tiny backside.

Could Furious Assault work? I mean, it's a way to get bthem down form 20 to 0 fairly quickly. I'll see if I can't get a list going.

Here's a possible G/R/u list:

2 Wooded Foothills
4 Misty Rainforest
2 Scalding Tarn
4 Tropical Island
1 Taiga
1 Volcanic
1 Mountain
4 Forest

Play both? Stifle affects Maga, just so's you know. :)

Cloudthresher seems like a really strong card: evoke for 4, get 7 mana out of it? Actually, pretty much any Evoke card that does something relevant to the game-state: Ingot Chewer seems especially...

Could Sneak Attack work as an alternative to SnT?