[Deck]BUG Eureka

[Madmankevinx]

Something I have been messing around with lately is a playset of one of my all time favorite cards: Eureka. This list probably seems ridiculous to many, but I have actually been pleased with the playtesting. I am open to any criticisms or suggestions that anyone might have.

Creatures:
2 Emrakul, the Aeons Torn
2 Griselbrand
2 Angel of Despair
4 Baleful Strix
2 Coiling Oracle

Planeswalker:
2 Nicol Bolas, Planeswalker
1 Karn Liberated

Sorceries:
4 Eureka
3 Show and Tell
4 Cabal Therapy
4 Ponder

Instants:
4 Force of Will
4 Brainstorm
2 Flusterstorm

Land:
3 Ancient Tomb
2 City of Traitors
3 Polluted Delta
4 Misty Rainforest
3 Tropical Island
3 Underground Sea
2 Bayou

[lochlan]

Eureka is one of my pet cards as well and I have tested UG Eureka lists extensively. Some comments:

Planeswalkers are absolute garbage since you can't play them off of Show and Tell. Putting a combo piece into your deck that only works with one of your enablers is an excellent way to ensure you have a brick in your hand in about half of your games.
Only 3 Show and Tell seems wrong. This is a combo deck, you don't want to skimp on combo pieces.
Baleful Strix is a card for control decks and doesn't really fit here.
Coiling Oracle should almost certainly just be Preordain.
Only 6 fatties seems like not enough. I play 10 in my list and still occasionally feel like I want one more.
13 blue sources (including fetch lands) doesn't seem like enough. That means you'll have an ~84% chance of getting one into your opening hand. You're going to probably want at least 15 blue sources for consistency.
Cabal Therapy is way too cute. You are clearly running small/bad creatures to enable flashing it back, but--assuming you're committed to black--I'm pretty sure a better strategy is to just play Thoughtseize and more fatties, to enable a quicker combo turn.
Both of your enablers are Sorceries, so you definitely want to play Boseiju in the side (and arguably one in the main). Crop Rotation is really good with Boseiju (since you can EOT it to play around Wasteland).
Consider running Stifle in the board as both Storm hate (which, even with Flusterstorms, you'll tend to have slight problems with unless you're a pro with Cabal Therapy) and CITP-effect hate (read: O.Ring effects and Angel of Despair).
Angel of Despair is one of your best creatures, you may want to consider running 1-2 more, either in the main or the board.
Five Sol lands in a three-color deck seems quite greedy.
Play Karakas to bounce Thalia/Teeg and blow up opposing Karakas.

[Madmankevinx]

Good suggestions and definitely points that I am aware of for the most part. I am quite fond of Cabal Therapy as I am no stranger to Legacy and the cards folks play with which is why I like the option of flashing it back with my little critters (who all replace themselves and chump block if needed to stay alive 1 or 2 more turns before I go off in some situations). I could see maybe cutting Karn, but Nicol Bolas is a beast (that pitches to FoW) that I just win too much with to cut from the list. I have run the "expected" lists that a U/G mage would be using, and just wanted to try out the Cabal Therapy trick to ensure my Eureka goes through. Excellent point with Boseiju and Karakas. A crop Rotation package in the board might be worth a try!

[phazonmutant]

If you're not running planeswalkers, isn't Hypergenesis just better? You get more "combo pieces" even if you lose some disruption.

[lochlan]

If you're not running planeswalkers, isn't Hypergenesis just better? You get more "combo pieces" even if you lose some disruption.

You answered your own question. [Edit: I was too vague here. I was referring to your comment about "losing disruption", but really what I mean is that the quality of permission spells goes down. Hypergenesis plays 4x Force and 4x MisD which is basically just protection for the combo turn. Eureka, being an actual blue deck, has more options. In terms of numbers I don't run more main deck than Hypergenesis--although I could, and have in the past, I am just currently using those slots for card selection--but I have options out of the board that they do not.] But there are other reasons [why Hypergenesis isn't just better], such as better mana and access to utility lands like Karakas and Boseiju. Hypergenesis is generally a bit too all-in with its fast mana, and also has problems with Chalice.

Planeswalkers are cool but when you only have four cards they can be played off of you're just decreasing consistency by increasing losses to variance.

I own both decks and although Eureka isn't the top deck in the format it has some game. It was a lot better before people planned for Omniscience. Hypergenesis, on the other hand, is fragile and weak. I don't consider it to be a playable deck although it's good for somebody new to magic who wants to steal games with broken plays.