Lets see for your questions, 1) Yidris is a better version of storm which was already an established t1 deck. Breya does not have the advantage of pretested decks (although sharuum arguements can be made), i cannot say the definative answer yet. 2) karador is a combo reanimator deck that allows killing from graveyard and deck (karmic reveilark and boonweaver 99 combos) as opposed to purely reanimator.

I am a novice deckbuilder at best, but I slapped together this: Atraxa, Druid's Voice.

It's basically a Hermit Druid deck with a Super Friends backup plan. I only took about fifteen minutes to get this list up. With some tinkering and optimization from a more experienced deck builder, could Atraxa, Praetors' Voice be a viable contender with Scion of the Ur-Dragon's Druid T1 slot?

Ok first, you have superfriends, but no doubling season. Secondly, hd and superfriends do not mesh that well. Hd is fairly glass cannon imo by itself. I do like your attempt. I would personally still think scion is better since red does offer tutors and better haste enablers. Maybe less interactivity cards would help like defense grid

also I feel like Scion of the Ur-Dragon IS the backup plan, replacing scion with Atraxa and diluting your deck as a different back up plan sounds like a recipe for failure, now, if some one comes up with a way to have atraxa contribute to the combo plan THEN I think we could look at a combo atraxa.

Just a newb tho, could be totally wrong

atraxa is mainly only useful for adding charge and storage counters (and the like) for fast free mana. The backup of atraxa HD tends to be blue sun(lilbrudder's secondary win), or decking opponents out (my tertiary win con)

Any Rashmi List? Here is my preliminary test list, note that it is not a cutthroat list but more of a friendly list that I want to be strong. I'm kinda new to EDH, this is my first deck so any advice appreciated.

1 Rashmi, Eternities Crafter

1 Vendilion Clique

1 Rhystic Study

1 Worldly Tutor

1 Mystic Remora

1 Defense of the Heart

1 Mana Drain

1 Strionic Resonator

1 Braingeyser

1 Primal Command

1 Verdant Catacombs

1 Maze of Ith

1 Arcane LIghthouse

5 Island

3 Forest

1 Botanical Sanctum

1 Wooded Foothills

1 Yavimaya Hollow

1 Scalding Tarn

1 Desertion

1 Windswept Heath

1 Recurring Insight

1 Polluted Delta

1 Time Stop

1 Tolaria West

1 Flooded Strand

1 Myriad Landscape

1 Blighted Cateract

1 Ancient Tomb

1 Reflecting Pool

1 Halimar Depths

1 Flooded Grove

1 Krosan Grip

1 Misty Rainforest

1 Yavimaya Coast

1 Simic Growth Chamber

1 Pongify

1 Reliquary Tower

1 Mana Reflection

1 Temple of Mystery

1 Command Tower

1 Hinterland Harbor

1 Tropical Island

1 Breeding Pool

1 Fact or Fiction

1 Mulldrifter

1 Mystic Confluence

1 Scroll Rack

1 Acidic Slime

1 Thought Vessel

1 Metallurgic Summonings

1 Skyshroud Claim

1 Torrential Gearhulk

1 Sol Ring

1 Palinchron

1 Trinket Mage

1 Snapcaster Mage

1 Glen Elendra Archmage

1 Simic Signet

1 Mana Crypt

1 Fabricate

1 Gilded Drake

1 Devastation Tide

1 Beast Within

1 Rapid Hybridization

1 Helm of Awakening

1 Venser, Shaper Savant

1 Force of Will

1 Burgeoning

1 Tooth and Nail

1 Lightning Greaves

1 Kodama's Reach

1 Cultivate

1 Cryptic Command

1 Farseek

1 Green Sun's Zenith

1 Panharmonicon

1 Leyline of Anticipation

1 Birthing Pod

1 Consecrated Sphinx

1 Teferi, Mage of Zhalfir

1 Oracle of Mul Daya

1 Eternal Witness

1 Temporal Mastery

1 Solemn Simulacrum

1 Deadeye Navigator

1 Merchant Scroll

1 Mind's Dilation

1 Mystical Tutor

1 Seedborn Muse

1 Sylvan Library

1 Sensei's Divining Top

1 Jace The Mind Sculptor

1 Future Sight

Idk if this was already mentioned, but what if for each of the fifteen partner commanders, we find out which partner or partners work best with that commander, and then put those duos in the description?

WerewolvesLover Please in the future just put a link to your deck list. Just listing it out in a comment box is close to unreadable and this comment section gets long really fast as it is.

yeah, Gigi beast you need to wipe all the comments soon, it's becoming a pain

Not sure if it helps but I believe the tazri list was a food chain one from like 3 months back. Also, I thought we had him as t1 before so what do you mean moving up to tier 2? lastly, I think I have a decent enough HD atraxa list to possibly move it to tier 2. Goldfishing gave an expected win of about 3.85 with a standard deviation of .8529 so might be worth looking into. It was also mirrored in lilbrudder's thrasios and tymna list soo it seems usable. thoughts? hope this doesnt violate the rules of self promoting and self biases.

My list: atraxa

lilbrudder's list: Thrasios 4 color HD prototype

Something that I discovered while brewing Breya I think is a bit silly broken.

Mana Echoes gives you 5 mana when you play Breya on an empty board. If displacer is in play the first flicker gives you 9 mana for a total of 11

Along with KCI and Altar this gives us 3 ways to win with displacer/mantle. Even if we don't have those that's a MASSIVE amount of mana.

Tazri: http://tappedout.net/mtg-decks/food-chain-tazri/

So, for those still wondering about yidris, a very knowledgeable person on the matter of storm, Mr. Moxnix himself, made a video explaining which is better and why. So i hope that video will answer everything everyone keeps stating.Video Here

Breya, Etherium Shaper is a pretty solid tier two general, but I feel that she could potentially take a tier one spot if Affinty were viable in the EDH format. I played Affinity in the Mirrodin block, and it was incredibly fast and outright broken. In fact, they banned quite a few cards from that set. But I digress, I think Breya's eligibility on Tier one status depends on how viable an Affinity deck could be in the EDH format. Does anyone agree?

Also, I have a submission for the tier two list: Sliver Overlord in The Queen's Egg

Ive found that affinity (or at least artifact based commanders) tend to be fairly strong and need effort to be taken down for good.sharuum was strong, daretti is fine, kurkesh gets wild, etc. I still feel as though sharuum has some advantages over breya in its own abilities but I cannot deny both strengths (time to re-add some torpor orbs and hushwing griffs to regain balance)

Breya has the utility and she can just kill the table if certain combos are in effect. Shruum takes specific cards. Hard to say really

both kill the table and both use similar cards. sharuum typically wins through: labman, bitter ordeal for a trillion, or simple alter milling. both are very similar, just breya adds red. Not sure yet if that is worthy of an upgrade to t1 or not yet.

Red does give a few utility cards, not the least being cards like Gamble and Wheel of Fortune. As I mentioned before Mana Echoes is also stupidly good with Breya as it enables massive mana gains for very little effort.

Their combos though are very different in that you don't have to devote slots to cards like Disciple of the Vault or Bitter Ordeal or LabMan who are only really good when you're going off. Breya focuses on mana and flicker combos which can be played as goodstuff until you go off. This does somewhat reduce dead cards since your main wincondition is your actual factual general rather than something that the general helps to enable.

Just a personal opinion here though.

(As a side note Marionette Master seems HILARIOUS as a Ashnods/KCI/Echoes + Displacer/Deathmantle loop victim for less competitive versions.)