Favorite Creature: Obsessed Wizard I agree with the team that first strike shoud be changed to like smart shroud or flying (smart shroud is it cant be target of opponents cards or abilities)

Favorite Enchantment: Relapse void, Although instead of copying the card for its converted mana cost make it a set cost you might want to look at Panoptic Mirror

Favorite instant/sorcery: Bagan's Waterfall in agreeing with the team its fine the way it is just may need word rearranging

Creature: Stridulating Swarm. Okay, to make it fair you nee to look at other cards like Wild Nacatl . Now Wild Nacatl is a common and Stridulating swarm is a rare so it CAN be much more OP than something like Wild Nacatl , but a 5/5 with 3 abilities for 3 seems too OP, maybe just reduce the buff they give down to +1/+1 each. I think that would make him fair.

Enchantment: Labour's Fruit. Okay, as of right now I think it's slightly OP. I think making it cost 3U and 0 colorless would make it fair, however I know that wouldn't be great in a multi colored focused set... You could make it cost just 2U and then have the player pay 1 colorless to draw.

Instant/Sorcery: Mental Block. Right now I think it's underpowered. I mean, yes it would be OP with an Isochron Scepter but you can't take into account other spells when judging something like that. Here's an idea and it would be interesting: Maybe make it cost 2U and also have, "...and can't put lands into the battlefield under their control." I disagree with making it target all opponents just because that won't be extremely helpful most of the time.

Also, I know I can't vote for two of the same catagory and you said you won't take into account comments on cards we didn't vote for, but have you considered giving Thought Storm suspend instead of a casting cost? That way they don't HAVE to pay the Flow cost.

favorite creature Flow Sphinx - i like this card, the draw ability does have a draw back, in that if you don't cast the card you drew for its flow cost then you have to discard it, so i am not sure that there needs to be too much done with the mana cost of it, for a few reasons.

1) The card you draw may not have flow at all and can't be cast for its flow cost, thereby forcing a discard.

2) the more you use the ability the less mana you have available to pay the cards flow cost... therefore you will be just forcing yourself to discard... usually not a very helpful thing.

3) It forces you to discard any lands which are drawn.

If you get it out on turn 5 that means you could active it twice, but the second activation means you have just 1 mana left to pay what ever card you draw's flow cost... which seems unlikely. meaning you are just forcing yourself to discard.

Enchant flowstorm is my favorite - i think the cmc should probably go down by 1 colorless for a total cmc of 5 vs its current level of 6.

Thought storm is the sorcery i like. I agree that you shouldn't be able to shuffle it back into your library, i also like the idea of not being able to cast it from you hand, because it limits how many mana you can devote to it based on what ever else you intended to do that turn. Lets face it this is a pretty powerful card otherwise if it could be cast from your hand. could add an effect like cycling 1 or something in case some one draws it and doesn't want to take advantage of the draw at that point in time. that way if you draw it in your opening hand it isn't a dead draw either. So there it is my suggestion is to add cycling. Also how about making the ability cost x(u) just to add some blue to the casting cost?

I specifically don't like the waterfall, as i feel it is too much of a return cascade, and cascade is very un blue. Waterfall may fit well in green or red... but i think this is not a good blue ability.

Creature: Amoebid Impermanent (Liked the idea of a Etherium Sculptor for Flow. Agree with tooling around with the pumps... any sort of Irindu-style benefits seem logical)

Enchantment: Relapse Void (I think this could be a 5 drop)

Instant: Bagan's Trickery (Seems versatile)

Labour's Fruit is Rhystic Study on steroids.

Stridulatiing Swarm -Starts as a 1/1 with everything else the same. Shapeshifter Essence -If I'm not mistaken the creature changes each time another creature enters the battlefield? This looks great, don't change anything. Flowing Thoughts I think it should be 1BB cost. Should draw three cards instead of one. I like that this card is a desperate last resort for just one card if the user doesn't meet the requirements.

Critter - Flow Sphinx. Maybe make the activation 2 and a blue?

Enchantment - Shapeshifter's Essence. I think this card is pretty fair as long as it can be changed by opponents creatures.

Sorcery - Thought Storm. Making its flow cost into XX may make it less powerful. The shuffle should probably stay as a way for someone to get value out of it if they dont need it right away. If they don't want it, it gets cast for 0, they get a new card and it goes back into the deck.

Also. Bagan's waterfall is just plain stupid. All you need is ONE decent sized creature with flow and that card be comes broken. "Let me just cast my 8 mana creature for three real quick..."

Critter: Viscous Plasma. It fits the theme of Irindu fairly well, has a reasonable flow cost (maybe reduce it to U, though), and can potentially combo REALLY well with the chosen mechanic. If it seems underpowered, which it may as a rare, you could add "and put a +1/+1 counter on it." to its tap ability- it gets stronger as it absorbs more energy, that sort of thing.

Enchantment: Shapeshifter Essence. Again, very thematic for the shard. Definitely make it until end of turn, though, or raise the cost by at least 1.

Instant: Mental Block. I get this awesome image of a wizard looking really, really constipated. You know, in a magical way. Just add "Draw a card." to it, and it'll be well balanced, I think. A pseudo-Silence .

I have to say it. flowing-thoughts is amazing, and should be kept exactly as printed. It's phenomenally balanced and very very strong in a dedicated Flow deck. A pat on the back to whoever thought of that one.

I also very much like sphinx-of-the-flow, but I think it should cost 2UU and be a 4/4 base, like Conundrum Sphinx .

My votes dont count but i figure i would put my two sense in . Creatures) I like viscous plasma or stridling swarm. I like viscous plasma more but if any of the other rares are copycat cards, then it would be redundant. Stridulating swarm fits really well with the changyness of irindu and i really like it. also a 4/4 for three isnt that OP.

Enchantments) I think shapeshifter essence is my favorite here, i also wouldn't change a thing, you have to remember yes its a little inexpensive but you get two for oned by any removal. Making this the copy cat card. if i had to pick a second one it would be labours fruit though it may be a little OP.

Spells) im really torn between two cards, Bagan's Trickery. which i really like (though its a copycat card soooo) Mental Block, to make it more powered i would just add, Draw a card, to it. (though then it becomes more mental theft then block har har) It seemse very usefull to me.

So my picks Stridulating Swarm-made into a 1/1 base Shapeshifter essence-no changes Mental block-made into a cantrip (at draw a card)

I'm in for Labour's Fruit if we have an added condition like:

"Whenever an opponent casts a sorcery or instant spell, you may draw a card. Activate this ability only twice a turn"

ok, so 2 conditions, but I think this will cut down a little of the abuse.

ok, so here are the rest:

Enchantment: Labor's Fruit (comments are above)

Creature: Sphinx of the Flow- I say up the flow and casting cost for an addition of shroud, shroud could put it over the top, but I think it'd be nice for built in protection, especially since the power is starting at 3. Only concern would be the addition of counters... Perhaps a +1/+0 counter instead for the cantrip?

Sorcery: Bagan's Waterfall- I like this, but I feel as if the flow cost should be upped to UUU1 or UU2

Instant: Thought Storm- I think we need to add a little here.. Up the mana cost to UU1 and change the effect to something like: "Opponents may not draw cards or cast instant spells until your next upkeep"

EDIT:

I meant the Instant "Mental Block"

Wow, I'm surprised one of my creations (Exhaustive Research) actually made the cut!

Here are my votes: Creature: Amoeboid Impermanent, though I do have a few issues with it. First of all I don't like the name, it feels a bit awkward to me. A change I would like to the last ability would be to change the last ability to a "choose one of" whenever you pay a flow cost, sort of like card:Jodah's Avenger, one of my favorite cards. Also, I believe that White and Black were chosen for the protection colors because they aren't present on the plane.

Enchantment: It's gotta be Shapeshifter('s?) Essence for me. I just think it's a cool card that I would like to play.

Instant/Sorcery: I quite like Thought Storm as-is. I guess one thing I like a lot about it is that as soon as you draw it it forces you to make a choice, gauging how much mana you want to spend right then for the effect. As other have mentioned above me, the "shuffle back into the library" effect is so that you don't have to hold on to a useless card in your hand if you can't/don't want to pay anything when you draw it.

@RetSpline

Yes, the idea for the Impermanent getting pro W/B was b/c those colors don't exist on Irindu and thus have no effect on him. And I like the choose one (or maybe two) for him.

Creature: (stridulating storm)

Enchantment: (exhaustive research) has the most potential without being broken like labor's fruit I feel.

Instant/Sorc. (thought storm), should be a mythic, because I think it's amazing. something absurd like a 9 cmc would be fine on it.

Flow's servant should be just 'sphinx mutant'. i think it adds more of a 'standard feel' to the card. dragons are inherently awesome, and not to be mutated at all in my opinion ;) unless you can get some REALLY awesome artwork for it anyway.

Obsessed wizard maybe to have shroud instead of first strike? potential game winner, up the cost by one colorless. Mayhaps.