The problem with Collective Voyage is, while you might be the individual player with the most benefit, all your opponents together are likely to profit more from the card than you do. Also, they untap with those new lands first (excluding special cases with stuff like Seedborn Muse), so the card seems a little too risky. Good old Gilded Lotus would be a much safer option that can also produce a nice amount of colored mana every turn, and even start the turn you cast it.

I usually try to cheat collective voyage on an end step with something like Vedalken Orrery but that is just me. Your argument is still sound.

Thanks for the suggestions, demonicgrizzly.

As far as Collective Voyage goes, I play it in my group hug deck, but that's about the only deck I can find a place for it. Tempt with Discovery works so much better most of the time, so I agree with Emzed.

Sylvan Library is a tricky one. That spot is currently taken up by Mirri's Guile, so here's question. Should I leave Mirri's Guile or should that slot be taken by Sensei's Divining Top, even though I almost always use it the same way I use Mirri's Guile? The Top doesn't give any devotion, cost an additional one mana to activate, but I can activate its second ability to save it from removal, something I can't do with Mirri's Guile, or should that slot be taken by Sylvan Library, which also can't stop its own removal, cost one more to cast (which is insignificant, I know) and lets you use your life as a resource for card draw.

So, assuming that I'm not going to have more than one of these in the deck, what do you guys think?

Sensei's Divining Top requires a couple points of mana over time, so i think it's fair to say it's effectively the most expensive of the three cards, even if the top right corner doesn't indicate that. The fact that Sylvan Library can actually produce card advantage is a big deal, and puts it slightly ahead of the two other options in my eyes. But, to make it even more complicated: Cream of the Crop could work in your deck in a similar capacity. It's less reliable than the other three at constantly manipulating your library, but it can be much more powerful at digging for specific cards when you drop a couple of fatties.

I agree with Emzed about Sylvan Library. I like that the top can save itself from removal, which is huge, though. I usually see people in my groups run both, so they can top at any given point in time.

Cream of the Crop is iffy to me. You may be forced to decide between two or more things that you really need and making the wrong decision could end badly

True, every now and then you will run into situations where you would like more than one of the cards you see with Cream of the Crop, but conversely with Sensei's Divining Top etc, you can get stuck with multiple cards on top that you don't need and no way to get rid of them. So that argument works both ways.
Cream of the Crop is a little different, but that has both up- and downsides. I've seen the card work very well in an Omnath, Locus of Rage deck, since that deck constantly produces a lot of 5 power tokens. It probably can't reach quite the same powerlevel here, but maybe it's still worth playing? I can't say for sure.

I hate to admit it, but I agree with you guys about Sylvan Library, I also think it's a slightly better option. The reason I hate to admit it is because I don't currently have a copy. I guess I'll have to include it on my next TCG order.

The problem I see with Cream of the Crop is that after you choose the card you want to put on top of your library, you can't draw it until your next draw step. By then, depending on what your opponents do, that top card may no longer be your best choice.

Food Chain and Eternal Scourge? fun little combo and you can use any single etc creatures to get more mana for omnath. I apologize but I am too lazy to look through 7 pages to see why you are not running Helix Pinnacle in this deck. Would you mind explaining?

Thanks for the suggestions, maddoxmtg.

I don't want tricky two card combos in the deck unless each card is good enough to be included on its own merit. Food Chain comes close, but Eternal Scourge would never make the cut on its own.

I did have Helix Pinnacle in the deck for a bit, but never really liked it. It's not particularly fun or interactive, and not that easy to pull off anyway. Hydra Broodmaster, Polukranos, World Eater or even Miren, the Moaning Well are way cooler mana dumps. Besides, it's better to not lose the mana to start with by using things like Yeva, Nature's Herald, Winding Canyons, Savage Summoning, Yavimaya Hollow, Spearbreaker Behemoth, Vigor, or Nim Deathmantle.

Nice deck! +1. I love fatty decks

Damn bud... 500+ bucks on your first EDH build? What a champ.

Thanks for the comment, GreenFuzzyNinja. It's not really your typical green fatty deck, but more of a voltron fat Omnath deck, although there are a couple of other fatties too.

The deck certainly didn't start out this expensive, CRKFIEND, but the more I work on it, the more I realize why certain cards carry such a hefty price tag. But hey, at least I don't have a Gaea's Cradle in here...

...yet

/;-)

I added it to my folder of inspiration.

I could ask for Burgeoning or Natural Order or Heroes' Bane or any number of eldrazi and X spells.

Thanks for the suggestions, Smileycorp.

In this deck, what do you think these suggested cards are better than, and why? Something has to come out if something else goes in.

I like Chord of Calling better than Natural Order. I like Defense of the Heart and Tooth and Nail a lot better than Natural Order.

Are you suggesting Heroes' Bane as a mana dump? I don't like it as well as Hydra Broodmaster or Polukranos, World Eater.

Eldrazi and X-spells are not what this deck is about and would totally change the dynamic of the deck. I'm wondering about your rational for adding these cards?

Burgeoning is a great card in a landfall deck, which this is not, or it's okay if it's in your opening hand. Otherwise it's a bit too hit-or-miss, don't you think?

Awakening

Thanks for the suggestion, TheInnsanity.

While I do agree with you that Awakening would be a good card in this deck, I just can't get over my aversion to helping out my opponents, even if it helps me more...maybe someday. I do have Tempt with Discovery in the deck though, so there could be hope for me.

I actually do have an Awakening but it's in my group hug deck where I feel much more comfortable running it.

You could try adding Helix Pinnacle for an added win con. you have enough instances of which mana is doubled or added in which it can work well for you and especially with this omnath.

Thanks for the suggestion, DnnyPrry.

I had Helix Pinnacle in the deck for a minute, but took it out for two reasons. One is, I don't really feel good about winning that way. The other reason is, I would rather just pump Omnath, hope I can get one of my evasion enablers or tramplers into play, or just keep attacking until there are no more blockers left. I only really had it in the deck to use as a mana dump anyway, in case Omnath got kicked to the curb while holding on to a bunch of mana. There are other cards I like better for this purpose.

I like it, and I like your casual approach. Nice list of cards you've got in there.

Pretty expensive for a casual deck eh?

Yes, it is. But I didn't see a Gaea's Cradle in there. If you're going to go all in on green...

Thanks for the comments guys.

Yeah TheMarcus, it did end up being rather pricey, but it happened over time, and didn't hit my wallet all at once. Still...ouch.

bushido_man96, I would like to have a Gaea's Cradle in the build, but I haven't made the leap from buying a twenty, thirty, or even the odd forty dollar card, to spending a couple of hundred dollars on a single card, and it's not like I could make insane amounts of mana with it anyway, it's not an elf token deck. So yeah, no Gaea's Cradle...yet.

Yisan, the Wanderer Bard?