This is my Shu Yun Tiny Leaders tempo deck, with lots of cantrips to trigger Shu and Jeskai Ascendancy and find key cards. I also use two of the Temples because scrying with a 49 card deck has been very useful in testing and worth them entering the battlefield tapped, and they produce two colors. I draw the line at two, though. I tried Temple of Triumph as a third and I just had too many lands coming into play tapped. Some cards I'm also considering are Monastery Mentor, Wasteland, Wing Shards, Celestial Flare, and Secure the Wastes. While 17 lands is a bit low, I usually have enough cantrips to compensate, and with 18 I usually get too many.
Methods of winning are typically either token swarm from Pyromancer, Brimaz, and Ascendancy, double-striking bigger creatures like True-Name, Brimaz, and Geist or Angel Token. Runechanter's Pike would give me more hitting power but I can't figure out anything to replace with it and I figure I've got enough power as it is. Oh, and I chose Mana Leak over Counterspell because I do sometimes have difficulty hitting double blue early and Mana Leak is often just as good. Meddling Mage can block Geist from resolving, Mother of Runes protects her, and Cavern of Souls naming Humans ensures she won't be countered, along with several other creatures. My sideboard is geared towards beating Geist and fast aggro, although I need more testing. If you have any suggestions or think I've missed any crucial cards, please let me know.
Updated since I bit the bullet and ordered dual lands that were on sale, and replaced Isochron Scepter with Runechanter's Pike thanks to seriph0's suggestions.
I'd cut either top or Isochron for the Pike if you really want. Top doesn't seem that great since you have so many cantrips, so the top cards don't really matter that much. Isochron seems slow and likely to get blown up before you get to use it, not to mention if it does die then you've just lost two cards instead of one.
Consider cutting Meddling Mage for the Phyrexian Revoker. I know it's not exactly the same effect, but overall his ability will be a bit more useful since you can blank cards that have already made it onto the field. He won't be as much of a dead draw as the mage will be. Plus he's better on the mana costs.
Good point on Isochron, I think I might replace that with Pike. I haven't gotten the chance to test Scepter and I forgot about the downsides of it getting destroyed. The reason I want to keep Top is that it helps once the cantrips are used, and I can tap it to return it to the top of my deck and play it again to trigger Ascendency and Shu. It's just so all around useful even with the cantrips, and it has been good in the testing I've done. I'll consider Revoker, although I like Mage a bit better because it can lock out any Commander whereas Revoker only stops activated abilities, and it works with Cavern of Souls. If I find I have difficulty casting Mage then I will definitely take it out for Revoker, but it might have a place in the Sideboard. Not sure if Crusader and Paladin are worth spots and might replace them with Pithing Needle and Revoker. Despite my previous statment I may also end up actually buying dual lands since there's a sale on the site I buy from, lol.
Methods of winning are typically either token swarm from Pyromancer, Brimaz, and Ascendancy, double-striking bigger creatures like True-Name, Brimaz, and Geist or Angel Token. Runechanter's Pike would give me more hitting power but I can't figure out anything to replace with it and I figure I've got enough power as it is. Oh, and I chose Mana Leak over Counterspell because I do sometimes have difficulty hitting double blue early and Mana Leak is often just as good. Meddling Mage can block Geist from resolving, Mother of Runes protects her, and Cavern of Souls naming Humans ensures she won't be countered, along with several other creatures. My sideboard is geared towards beating Geist and fast aggro, although I need more testing. If you have any suggestions or think I've missed any crucial cards, please let me know.
1 Shu Yun, the Silent Tempest
Lands: 17
1 Command Tower
1 Reflecting Pool
1 Flooded Strand
1 Arid Mesa
1 Scalding Tarn
1 Tundra
1 Volcanic Island
1 Plateau
1 Hallowed Fountain
1 Steam Vents
1 Sacred Foundry
1 Temple of Enlightenment
1 Temple of Epiphany
1 Cavern of Souls
1 Island
1 Plains
1 Mountain
Creatures: 10
1 Mother of Runes
1 Soulfire Grand Master
1 Young Pyromancer
1 Meddling Mage
1 Snapcaster Mage
1 Dualcaster Mage
1 Geist of Saint Traft
1 Vendilion Clique
1 Brimaz, King of Oreskos
1 True-Name Nemesis
1 Lightning Bolt
1 Swords to Plowshares
1 Path to Exile
1 Brainstorm
1 Condemn
1 Mental Misstep
1 Spell Snare
1 Mana Leak
1 Izzet Charm
1 Lightning Helix
1 Remand
1 Magma Jet
1 Impulse
1 Electrolyze
Sorceries: 5
1 Ponder
1 Preordain
1 Sleight of Hand
1 Gitaxian Probe
1 Chain Lightning
Other: 3
1 Sensei's Divining Top
1 Runechanter's Pike
1 Jeskai Ascendancy
1 Fiendslayer Paladin
1 Mirran Crusader
1 Spellskite
1 Bonfire of the Damned
1 Starstorm
1 Anger of the Gods
1 Disenchant
1 Detention Sphere
1 Chaos Warp
1 Counterflux
Updated since I bit the bullet and ordered dual lands that were on sale, and replaced Isochron Scepter with Runechanter's Pike thanks to seriph0's suggestions.
Consider cutting Meddling Mage for the Phyrexian Revoker. I know it's not exactly the same effect, but overall his ability will be a bit more useful since you can blank cards that have already made it onto the field. He won't be as much of a dead draw as the mage will be. Plus he's better on the mana costs.
Seriph0 on cockatrice
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