I have raved about Fist of Suns + Eldrazi for a while now, and I am happy to see that people are coming to the same conclusions. This is an extremely powerful combo, and I think that the OP's list is going in the right direction.
I do, however, have some problems with it.
1) Lots of secondary/tertiary win conditions
Emrakul can't be countered. The vast, vast majority of decks in Legacy run FoW, with many more running Daze. Why bother with Maelstrom/Iona/Nicol Bolas/etc, all of which are easily countered, when you can just run more tutor effects to find Emrakul? I agree that some alternate cards might be warranted (Maybe a lone Iona or even Reiver Demon for board-wiping), but the emphasis should be on Emrakul/Fist.
2) No disruption
Combo decks that don't have disruption are bad. Every combo deck worth naming (Flash Hulk/Reanimator/Trix/ANT/Cephalid Breakfast/etc.) has run playsets of FoW/Duress/Pact of Negation/Daze/etc. To do otherwise is asking for autolosses against various decks. In this deck's case, 4 FoW and 4 Duress should be sufficient, although maybe additional disruption could be boarded in (Therapy/Pact/etc.)
3) General lack of power
The initial decklist, and most subsequent comments, have ignored the fact that this deck uses some suboptimal cards. Harmonize? Wrath of God? Brainstorm and Lim-Duls Vault should be the cards of choice, tutor and draw effects to dig for your combo pieces.
Now, in regards to the comments made after the decklist was posted...Prismatic Omen is a sub-optimal card in this deck. It turns a 2 card combo (perfectly attainable) into a 3 card combo. The only reason to run Omen is if Eye of Ugin is also included in the deck. As of now, there are no colorless spells worth paying 7 mana for to tutor up; by the time you have 7 mana, you really need to be swinging with Emrakul. Why include a mana fixer when a deck's mana base can be extremely robust on its own? City of Brass, Tarnished Citadel, Fetchlands, etc. These all make the deck powerful without Omen.
There is no doubt that Fist of Suns is the best way to play Eldrazi. This is especially true of Emrakul. Why? Because only through casting Emrakul can you gain the full benefit of his rules text.
1) Can't be countered
This is critical. With a few exceptions (Oath of Druids and Sneak Attack, for instance) Emrakul needs 2 cards to get into play. In the case of Shallow Grave, you need to discard him and then reanimate him. In an eternal format full of Daze and Fow, it is critical to have as few counterable combo pieces as possible. If you hardcast Emrakul (something Fist lets you do), then you effectively have a 1 card combo; the Fist itself.
2) Take an extra turn
This basically gives Emrakul haste, and lets you untap your 5 mana that you cast the Eldrazi with, and lets you draw at least one more card before your opponent goes.
Fist of Suns takes advantage of both of these abilities. The Fist itself is also quite cheap. At 3 mana, any deck that puts in even the smallest amount of effort can cast it on turn 2. Turn 1, Birds/Elves/Mox/Petal/etc. Turn 2, drop Fist. This lines you up for a turn 3 or 4 hardcast of Emrakul, provided you have a robust manabase. With fetchlands, City of Brass, Tarnished Citadel, Gemstone Mine, mox/lotus mana, and so on, this should not be a problem.
Fist also avoids the graveyard. Any combo that uses the graveyard immediately opens up the deck to the 4-6 sideboard cards in every eternal deck's board that are specifically included to exile graveyards. Combo decks must be resilient, and the graveyard is far from safe.
There are many people who might claim that Fist itself is quite vulnerable. This may be true; lots of decks use Krosan Grip, Ancient Grudge, Oblivion Ring, Thoughtseize, Duress, etc. And yes, all of these cards do pose a problem to the Fist. But what about Oath? Sneak Attack? Defense of the Heart? These cards are equally vulnerable to the same slew of cards (although with Grudge switched out for Ray/Wispmare/Claim/etc.) They are all also equally vulnerable to counter magic, especially the cost effective Eternal format kind.
Fist of Suns is not just a casual combo piece, as has been cautiously suggested. Emrakul/Fist is the core of a very powerful potential deck for future formats. All other alternatives are simply less abusive, less resilient, and slower.
The card references itself twice in the text. Moreover, it looks like Charge Counters might be around. This could be a potential homage to Aether Vial, or just a revision of its broken predecessor.
With the keywording of remove from the game (Exile), there is only one thing that this can mean. There is at least one card that causes you to win and/or lose the game in this set.
Because it seems unlikely that Wizards would make 2 cards in the set (one that causes a win and one that causes a loss), or reprint a new Abyssal Persecutor so quickly, it is probably that this is one in the same card. Something like...
[Do X]
If [Y], then you win the game.
If [Not Y], then you lose the game.
I do, however, have some problems with it.
1) Lots of secondary/tertiary win conditions
Emrakul can't be countered. The vast, vast majority of decks in Legacy run FoW, with many more running Daze. Why bother with Maelstrom/Iona/Nicol Bolas/etc, all of which are easily countered, when you can just run more tutor effects to find Emrakul? I agree that some alternate cards might be warranted (Maybe a lone Iona or even Reiver Demon for board-wiping), but the emphasis should be on Emrakul/Fist.
2) No disruption
Combo decks that don't have disruption are bad. Every combo deck worth naming (Flash Hulk/Reanimator/Trix/ANT/Cephalid Breakfast/etc.) has run playsets of FoW/Duress/Pact of Negation/Daze/etc. To do otherwise is asking for autolosses against various decks. In this deck's case, 4 FoW and 4 Duress should be sufficient, although maybe additional disruption could be boarded in (Therapy/Pact/etc.)
3) General lack of power
The initial decklist, and most subsequent comments, have ignored the fact that this deck uses some suboptimal cards. Harmonize? Wrath of God? Brainstorm and Lim-Duls Vault should be the cards of choice, tutor and draw effects to dig for your combo pieces.
Now, in regards to the comments made after the decklist was posted...Prismatic Omen is a sub-optimal card in this deck. It turns a 2 card combo (perfectly attainable) into a 3 card combo. The only reason to run Omen is if Eye of Ugin is also included in the deck. As of now, there are no colorless spells worth paying 7 mana for to tutor up; by the time you have 7 mana, you really need to be swinging with Emrakul. Why include a mana fixer when a deck's mana base can be extremely robust on its own? City of Brass, Tarnished Citadel, Fetchlands, etc. These all make the deck powerful without Omen.
-ktkenshinx-
1) Can't be countered
This is critical. With a few exceptions (Oath of Druids and Sneak Attack, for instance) Emrakul needs 2 cards to get into play. In the case of Shallow Grave, you need to discard him and then reanimate him. In an eternal format full of Daze and Fow, it is critical to have as few counterable combo pieces as possible. If you hardcast Emrakul (something Fist lets you do), then you effectively have a 1 card combo; the Fist itself.
2) Take an extra turn
This basically gives Emrakul haste, and lets you untap your 5 mana that you cast the Eldrazi with, and lets you draw at least one more card before your opponent goes.
Fist of Suns takes advantage of both of these abilities. The Fist itself is also quite cheap. At 3 mana, any deck that puts in even the smallest amount of effort can cast it on turn 2. Turn 1, Birds/Elves/Mox/Petal/etc. Turn 2, drop Fist. This lines you up for a turn 3 or 4 hardcast of Emrakul, provided you have a robust manabase. With fetchlands, City of Brass, Tarnished Citadel, Gemstone Mine, mox/lotus mana, and so on, this should not be a problem.
Fist also avoids the graveyard. Any combo that uses the graveyard immediately opens up the deck to the 4-6 sideboard cards in every eternal deck's board that are specifically included to exile graveyards. Combo decks must be resilient, and the graveyard is far from safe.
There are many people who might claim that Fist itself is quite vulnerable. This may be true; lots of decks use Krosan Grip, Ancient Grudge, Oblivion Ring, Thoughtseize, Duress, etc. And yes, all of these cards do pose a problem to the Fist. But what about Oath? Sneak Attack? Defense of the Heart? These cards are equally vulnerable to the same slew of cards (although with Grudge switched out for Ray/Wispmare/Claim/etc.) They are all also equally vulnerable to counter magic, especially the cost effective Eternal format kind.
Fist of Suns is not just a casual combo piece, as has been cautiously suggested. Emrakul/Fist is the core of a very powerful potential deck for future formats. All other alternatives are simply less abusive, less resilient, and slower.
-ktkenshinx-
Angelheart: 3
Vial: 3
Charge: 6
The card references itself twice in the text. Moreover, it looks like Charge Counters might be around. This could be a potential homage to Aether Vial, or just a revision of its broken predecessor.
-ktkenshinx-
Rather: 1
Without: 15
Instead: 11
Cast: 51
Whenever: 39
Anywhere: 3
Postcombat: 1
Additional: 9
Extra: 2
As: 54
When: 36
At: 29
If: 43
-ktkenshinx-
Coin: 0
Game: 2
Lose: 1
With the keywording of remove from the game (Exile), there is only one thing that this can mean. There is at least one card that causes you to win and/or lose the game in this set.
Because it seems unlikely that Wizards would make 2 cards in the set (one that causes a win and one that causes a loss), or reprint a new Abyssal Persecutor so quickly, it is probably that this is one in the same card. Something like...
[Do X]
If [Y], then you win the game.
If [Not Y], then you lose the game.
Or something to that effect.
-ktkenshinx-
8/2: 0
8/3: 0
8/4: 0
8/5: 0
8/6: 0
8/7: 0
8/8: 3
8/9: 0
8/10: 0
9/1: 0
9/2: 0
9/3: 0
9/4: 0
9/5: 0
9/6: 0
9/7: 0
9/8: 0
9/9: 2
9/10: 0
10/1: 0
10/2: 0
10/3: 0
10/4: 0
10/5: 0
10/6: 0
10/7: 0
10/8: 0
10/9: 1
10/10: 1
-ktkenshinx-
6/2: 0
6/3: 0
6/4: 0
6/5: 0
6/6: 8
6/7: 0
6/8: 0
6/9: 0
6/10: 0
7/1: 0
7/2: 0
7/3: 1
7/4: 0
7/5: 0
7/6: 2
7/7: 3
7/8: 0
7/9: 0
7/10: 0
-ktkenshinx-
4/2: 2
4/3: 3
4/4: 12
4/5: 2
4/6: 0
4/7: 0
4/8: 1
4/9: 0
4/10: 0
5/1: 0
5/2: 0
5/3: 2
5/4: 2
5/5: 7
5/6: 0
5/7: 1
5/8: 0
5/9: 0
5/10: 0
-ktkenshinx-
2/2: 23
2/3: 6
2/4: 7
2/5: 3
2/6: 1
2/7: 0
2/8: 1
2/9: 0
2/10: 0
3/1: 1
3/2: 1
3/3: 13
3/4: 1
3/5: 3
3/6: 1
3/7: 0
3/8: 0
3/9: 0
3/10: 1
-ktkenshinx-
0/1: 19
0/2: 1
0/3: 3
0/4: 4
0/5: 0
0/6: 1
0/7: 0
0/8: 0
0/9: 0
0/10: 0
1/1: 23
1/2: 4
1/3: 4
1/4: 2
1/5: 1
1/6: 0
1/7: 1
1/8: 0
1/9: 0
1/10: 0
-ktkenshinx-
First: 6
Strike: 7
Shadow: 0
Deathtouch: 4
Shroud: 1
Protection: 2
Plainswalk: 0
Islandwalk: 1
Swampwalk: 1
Mountainwalk: 0
Forestwalk: 0
Morph: 0
Reach: 2
Trample: 10
Flying: 37
Vigilance: 4
Lifelink: 3
Fear: 0
Intimidate: 0
Haste: 6
Regenerate: 2
Landfall: 0
Unblockable: 4
Equip: 4
Indestructible: 3
Quest: 0
Kicker: 0
Multikicker: 0
-ktkenshinx-
1: 43
2: 27
3: 24
4: 15
5: 3
6: 6
7: 8
8: 7
9: 2
10: 2
11: 2
12: 1
13: 0
14: 0
15: 1
16: 0
17: 0
18: 0
19: 0
20: 1
-ktkenshinx-