The Golden Game

{Spoiler}
Jartis - An incredibly chaotic way of inciting group slug in UB is fairly interesting though it does feel Grixis with the end result it creates. Could result in a feel-bad situation where one player can't play anything but also can't really do anything but wait until they're actually taken out of the game though.

augur - Good way to get control magic effect down to uncommon since the other player can just bait it out if it's used wrong. I like that you didn't give it Flash and instead opted to find another way to force the player using it to keep it locked on the creature they want but I think it should also have a activation cost or something similar because as is right now it dodges enchantment removal too easily imho (which is usually one of the built in safety valves to answer Control Magic type effects).

melono - While the twist is cool I have a big struggle on seeing why I would play this over something like Arcane Adaptation where I can get any tribe I want or Living Death which at least lets me cycle out my own board and/or disrupt the opponent's board. As a 'sac outlet' better, cheaper options exist in Modern like Viscera Seer. Overall it seems like a very flavorful card but struggles to beat any of its competition.

Tesagk - I feel like for the intents and purposes of what this card wants to do relative to say Gwafa Hazid, Profiteer (who has roughly the same idea in mind) allowing creatures with power 1 to attack doesn't do much for the card, especially if I understand correctly that the more peace counters the card accumulates the more creatures open up to be able to attack again. I'm not sure if that was intended but I do like the idea of a temporary Propaganda type effect that gradually switches around into a wincon.

gateways7 - Simple yet effective, it might struggle with the classic aura problem of being an easy 2-for-1 removal target but at the same time if you can get it up and running it has useful lasting effect and is definitely a common I would be happy to see in a pack. Very good design, could go into a set right now if you wanted it to.

spruder - Quite a bit to keep track of if you're using this to swap tons of creatures with this card. That said I like the concept and the potential for an opponent to play around it even with a creature heavy deck even if they're going to be on the backfoot when you have it out.

Flo00 - A more limited Amulet of Vigor that is intended to turn every ramp spell you cast into something more efficient. I agree I would be more comfortable with it at 3 cmc though I think it's worth noting the first effect mostly only works with a very narrow group of cards and Panglacial Wurm since a good chunk of their Red counterparts will exile first then allow you to play it.

viriss - I feel like can't help but notice that you and gateways7 would likely be competing for the same card slot in a set. Judging this in a vacuum though I'm a big fan of the fact you can flash out a creature to prevent this card from being a useless play due to removal.

lordojutai - This is a very unusual concept but I like the idea of using it to build Storm count repeatedly. It feels more controlled than Storm (though I think having it do 2 damage to any target would be more interesting) but I do feel going the Flame Slash route is the safer route here.

Fleur - "Everything becomes ball lightning" is an effect I'm fond of playing around with - that said I think this is too efficient because with a multicolor shockland you're basically asking for Ball Lightning for 12 instead of 6 and I feel like that's a bit too easy to pull off in its current state. I'd suggest either a flat boost + evasion (maybe menace) instead (because I think boosting it to CMC 3 ruins why you're supposed to use it to begin with.)

Winners: A lot of good designs, most people really only were slightly off the mark. I think most of you should tweak these designs and see if you could either proxy them in an EDH/tabletop deck or put them in a set.

1st: gateways7 - In the end, I think I like the idea of trying to rush out creatures to get more use out of the aura more.
2nd: viriss - That said i think the idea of having a slow gradual growing aura that you can salvage at the drop of a hat is also an excellent take on the aura at this slot.
Honorable Mentions: lordojutai, Fl00, Tesagk, Yoshi