IQuarent, I can see why you're questioning the main win condition.

As a fellow Damia player, hopefully I can help out from my experience:

As you say, we have numerous backup methods of achieving infinite mana in case one of the pieces gets disrupted/unavailable. Yet we only run one Blue Sun's Zenith-like spell. No Prosperity or Stroke of Genius etc.

This is because those spells are otherwise bad draws that you don't want to sink mana into early-game or mid-game since you're still establishing your combo pieces. The exception here being Blue Sun's Zenith for the purpose that it shuffles in and can be re-used easily. (Plus occasionally it's a 3 mana shuffle your library)

Now, as you pointed out, what if, on the off chance Blue Sun's Zenith became unavailable to us, perhaps from Slaughter Games or something. How do we win? Well, there are backup win conditions that can be achieved with infinite mana. And each of those won conditions can serve a purpose in the deck outside of the combo as well. Venser, Shaper Savant is one example. Bounce everything and just start turning sideways. In my deck, Reality Shift/Gonti, Lord of Luxury is a second backup win condition, allowing my to exile my opponent's libraries. Occasionally I throw in Villainous Wealth as a third backup win condition for the games where I want to win in a silly way.

So you see, while we have only 1 "draw X" spell, we're certainly not out of options for other ways to win.

its so interesting in the damia vs tasigur thing, how tasigur can give you all your cards from deck and graveyard once you have the infinite mana combo, what is the option damia has? i just started gettin more serious about edh and realizing sultai's potential and dont have seen any damia in action.

Trveheimer I've played my Damia deck for 3 years now, and it is by far my favorite. If you're still interested, I can give you reasons why I prefer Damia over tasigur.

First, Damia doesn't require you to have combo pieces for you to draw. With her, you'll always have 7 cards in hand. But you can still combo her. I like Leyline of Anticipation and Seedborn Muse as you can flash dump your hand on your opponent's turns and always draw back to 7.

Second, she has the weird quirk where you skip your draw step and if you have 7 cards, you don't draw any. Meaning that if someone tries to mil you out, you have the option to not play anything, and therefore not draw, and not lose the game.

Third, Damia doesn't force you to have graveyard recursion. It's still probably a good idea to have something to get cards back (I use Primal Command and Elixir of Immortality myself), but with Tasigur, you're pretty much forced to have cards that bring back important combo pieces from your graveyard (any player who knows what's up will never pick a combo piece for you if they have a choice).

I guess what I'm saying is that Damia is a flexible card. She doesn't force you to have any cards in your deck, no combo pieces, no graveyard recursion, ect., yet she's still BUG and still is a great draw engine. She lets you get away with not having many, if any, draw spells, yet lets you draw a lot without having to sink a ton of mana into her. Plus, she has deathtouch. It doesn't come up often, but having a deathtouch blocker you can play multiple times is worth a look at. Don't forget, commander damage is a way to win too. Few people will block a deathtouch creature unless they have to.

"Damia doesn't require you to have combo pieces for you to draw"im not sure if i understand what u are trying to say here, doesnt the thing of playing combo or not depend on the level of your playgroup?

"with Tasigur, you're pretty much forced to have cards that bring back important combo pieces from your graveyard"

well, i actually dont play tasigur as graveyard based deck until i get infinite mana, as then tasigur will give me everything in the deck by repeating the process infinite times (resulting in all land cards from deck in GY and all non-land cards in my hand). i see how damia has a value of simply drawing you cards and giving sultai colour, but i dont think tasigur is dictating too much playstyle here. he can be a casual golgari + blue graveyard reanimator or a blue based control-combo deck like mine. also, his delve + topdeck manipulation sometimes gives the oponent no choice on the returned card. but i rarely use the ability out of the combo and in many games tasigur himself will only be cast as blocker if not only for the combo.

I believe the strength of damia is not having to be the all-in bet tasigur sometimes is. having just like 10 more spots for stuff other than drawing it can be more present . still, for me its quite relevant to have an insta-win when goin infinite (and having 1-2 counters ready as well), and i actually can imagine situations with damia where this isnt guaranteed, tho i've never seen any in action. the deathtouch is nice but so is the delve (u can go for early evil with birthing pod or eldritch evolution when sacrifising tasigur, and you can cast him very easily if needed). Damia is more oldschool, as she needs to be on the board to do the drawing, while tasigur is only a combopiece in the end. both are the most interesting sultai commanders for me as i dont liki sidisi or mimeo for their dependance on graveyards.

Damia doesn't require an infinite mana combo for you to draw cards. You can have an empty board and she'll still draw you cards. I meant that you didn't need to have a combo with her unless you wanted to.

Delve is very nice. I can't tell you how many times I wished Damia had come out just a bit sooner. But that's where the mana ramp comes in. (Also, a really nice card for delve in BUG is Torrent Elemental. It may only be one card, but you can do it all day long.)

I think I agree with most of what you said. I like Damia cause I can build my BUG deck without having to build around her, and get away with having no draw cards. My play group usually doesn't play infinite combos, but I can see that with one that does you would have to have them as well. I think Tasigur can be a really fun Commander, though I've never played him myself. Hopefully we both learned a little about why people run one or the other :DOh, and there is one more BUG commander. Vorosh, the Hunter decks usually go for the Commander damage victory.

I like this deck, only problem I see isnt its really weak against Nekusar decks. Maybe its just me, but it seems like someone is always playing Nakusar in my play groups.

when i built my version i threw in some big beastys like Vorinclex, Voice of Hunger to keep opponents from doing things while at the same time swinging and they still fit the theme. http://tappedout.net/mtg-decks/never-lose-card-advantage/ Tho i too am looking for a definitive win con i don't rely on infi mana combos cause they're to easy if your gonna do it tho you can also throw in Torment of Hailfire, Exsanguinate, Consume Spirit, Drain Life if your gonna rely on a infi mana combo. I also threw in a little mill with Sire of Stagnation its slow but it also allows for your opponent to question wither or not to put a land for turn sometimes that messes with plays and i like the 5/7 allowing me to swing without fear. i also threw in this card Villainous Wealth cause it lets me remove cards from the top of players decks

Im with IQuarent, no real win cons except making the opponent not want to play anymore. Take away the infinite mana providers and this deck is now shut down. People love not explaining how they win so someone just copied and pasted a url. My sultai deck clearly has a win con, damage. Muldrotha is the commander because I use easy to follow combos that win consistently and I dont worry about being countered because I'll just play it from the grave instead.