Puschkin

* Urzatron in a 100 card highlander deck? Good luck.

* Consider creatures like [[Sakura-Tribe Elder]] and [[Yavimaya Elder]] instead of cards like Rampant Growth. It grants you additional chump-blocker.

* I think you you'll run out of cards fast and then draw too much ramp. Some draw options:
- [[Momentous Fall]] sounds perfect for this deck because it also covers lifegain
- So does [[Lifeblood Hydra]]

What about [[Quest for Ula's Temple]]?

While searching I stumbled up [[Serpent of Yawning Depths]] which should probably also be in this somewhere.

Yeah, so I remembered correctly, what I forgot was that it isn't visible immediately, you have to reload the page or switch tabs back and forth ...

Do you really think [[Kiora bests the sea god]] belongs to this? I mean, thematically, it is the downfall of Thassa, not heir reign.

I also question Arcane Signet in a monochrome deck. Could be [[Mind Stone]]

Look at right "Mana Symbol Occurence". It means, among your cards, you need 37 black mana but only 11 blue and just 6 white. Now have a look at your mana base which has 6 Islands, 6 Plains and 6 Swamps. Two Watery Graves can't fix that.

Six discard spells aren't enough to justify 3 Waste Not.

You don't have artifacts, so why bother with Artificer's Epiphany? [[Probe]] is that much better. If you replace this with Probe you might actually keep Waste Not.

Aphotic Wisps does nothing in this deck. If you just want to draw a card for cheap, you could try [[Ponder]], [[Portent]], [[Opt]] etc, all of them do more than just draw a card.

Sheodred's Edict is your only removal spell, you should run 4.

You need more early defence. [[Baleful Strix]] draws a card, it should be in here at 4 copies

[Opt]
{Opt}
[[Opt]]

In cases anyone is still active I forgot how to link cards in comments and the FAQ still doesn't have this information.

And ... 4 years later this deck that started out as a budget deck (under 50$) is currently worth more 250, crazy times!

That's easy for me, I traded them away and won't spend that much money on a card for casual just to annoy everyone :)

Maybe add more Sagas.

Oh, I just saw the "tournament" tag ... for what format!? I supposed for Modern, but I really think, in that case you'd need to go the path of combo ... but the most potent weapons (Dreadnought and Burst) aren't modern legal. And Legacy/Vintage are way too fast for Pandemonium in serious tournament style.

Summoner's Pact? That is only viable if you kill the turn you play it, which would mean full combo mode and your deck isn't. Pandemonium doesn't care if the creature survives so you could go full combo with cards like [[Phyrexian Dreadnought]]. But it looks like you still want to attack with "regular" creatures, and with those, I don't think the Pact is viable. Pandemonium itself is already risky enough because your opponent can use it as well. Speaking of which, have you considered playing this with [[Circle of Protection: Red]] or similar cards? You could also protect yourself with [[Glacial Chasm]] but then you can't attack anymore, so that's probably for the combo version.
I am also unsure about the Uktabi Drakes, they will usually hit play before Pandemonium and later they are too small. They do work nice with Wildebeests, though, in case you don't have Pandemonium. What about [[Greenbelt Rampager]] instead?

Back in the old days we played Pandemonium with [[Saproling Burst]] and called it a day (21 damage to the face)

Did you ever build this?

Yeah, this is all over the place, nothing really works together and I don't even see where you do the things you want to do according to your description :) I mean, ok, the Ana Battlemage discards but that costs a total of 6 mana, that's too late for "stalling the opponent" (also, for 6 mana you get [[Amnesia]] By the way). Venarion Glimmer is a very weak discard spell and you only run 2 of them. Pirate Charm discards 1-for-1 which doesn't put you forward. Wistful Thinking finally discards and stalls, however, if that's the only discard that hits the opponent you might end up helping him! See, he also draws 2 cards. So, if he had some situational or too expensive cards in hand this spell could end up having a better albeit smaller hand than before.

The main question would be: Why do you want to do a deck like this in green/blue? Black has the best discard and you already have that Battlemage with a black kicker option you currently can't use, so why not splash black?
I suppose you just wanted to do things differently for the heck of it and assume splashing black is out of question. Then we have some serious rework to do.

First of all, green and blue have a variation of discard where they put the cards back on their library instead of the graveyard. Maybe have a look into that because it accomplishes what you want to do: Stall your opponent until your beasts can go to town. [[Stunted Growth]] is a serious contender for example. [[Temporal Spring]] also comes to mind.
Next, you could use artifacts. Good old [Disrupting Scepter]] is perfectly fine for a casual deck like this.

Other problems:
As it is I don't see the point in ramping mana other than accelerating the Mauler which you run three of. Also, the only other (sort of ) fatty is the Gargantuan which requires you to bounce your own creatures. Only the Battlemage could benefit from that but only very late in the game. So, I really think those Cultivates/Rampant Growths should be [[Coiling Oracle]]s. They can also accelerate, smoothen the mana curve and provide nice targets for the Gargantuan (with the possibility to have an Oracle turn 2 and Gargantuan turn 3). Rampant Growth could also be upgraded to [[Evolution Charm]] which just has more options.

"Better fill the graveyards than counter just 1 spell."
Well, you could do both with cards like [[Countermand]]
But I think [[Didn't Say Please]] has the most funny name.

But can you handle the additional cards they get? Remember, if you are the annoying one, they'll hit you first with those cards. Olli has a Standstill deck but he couples it with [[Arcane Laboratory]], which not just also annoying, it's a deadly combo. And games are horrible. Anyway, Standstill without backup doesn't do good.

Oh and it wouldn't hurt to add an additional copy of the Leyline - it's crucial for the deck and although you have have some filter cards you might end up getting it too late or not at all.

More thoughts: The Bazaar actually WANTS cards in the graveyard in order to work. So, maybe, it's better to mill than to exile cards. Also, while Elixir of Immortality is usually a very good card, it is maybe counterproductive in here. See. of you have a Counterspell in your graveyard, nobody can play a Counterspell anymore. Then again, there are so many cards, that it is highly unlikely that anybody else has the same cards as you, even of they are good ones that are typically played. So maybe keep the Elixir.
But it you have a favourite mill card, consider replacing the Cap with it. Because most players will have multiples of the same card in their deck. So, if you mill a card, nobody can play it anymore. That's better than currently where they can play their first copy without problems.
[[Cellar Door]] is a harmless/slow mill card that also provides you tokens to block attacks.
[[Keening Stone]] is a brutal mill card that does nothing else. It's a true win condition in this deck and nasty with Bazaar.
[[Jace's Mindseeker]] is a combination of mill and [[Grinning Totem]], essentially you mill for 5, play one of them and you also got a 4/4 flyer.

[[Sol Ring]] is missing.

EDIT:
I don't know why the link tag for the Mindseeker doesn't work, the spelling is correct.
https://www.mtgvault.com/card/jaces-mindseeker/M14/

Don't forget the best of all multiplayer counterspells: [[Insidious Will]]. It's a counterspell, Fork or Deflection, whatever you need. All three options are annoying and therefore should be in this deck^^

[[Clever Impersonator]] should probably also be in here, gives you so many options.

If you have one, [[Karakas]] should be in. With Leyline, this is a monster.

[[Rhystic Study]] instead of Opportunity should also add more annoyance :)

Main problem would be that can't do much about creature based decks early on. One of my favourite cards and "secret weapon" (so secret I have bought a playset but never used them so far) is [[Portal Mage]]. I guess you'll love him, too.

No, rather replace the Terrain Generator with a Mountain. Don't go below 22 land, your deck is more expensive now than the original build.

Yeah, about that - sometimes you commented on my decks and tried to squeeze in random mill cards even though the deck doesn't mill at all. But the one deck I have that DOES mill never got a comment of yours. That was always odd for me.
https://www.mtgvault.com/puschkin/decks/occ-bring-it-on/