Challenge Slots

{Judging} Jartis: This is effectively a way to pay 2UU to get all of the cards exiled with it, which effectively makes this a really effective mode of card draw, while also not making you skimp on playables because you can exile cards of colors not in your deck. Also, I think the card would be better if you could just cast the spells (with their colors) rather than being forced to pay blue mana only. (Also, since you don’t need to spend the respective colors of the cards, you could make the argument that it breaks the color pie by giving blue access to things like discard, targeted removal, burn, and a bunch of other stuff.)

CanterburyEgg: This is a really solid card that I think has enough searching power to have a good chance to cast one of the three noted cards while not being good enough to do it consistently. I also really like that it’s the next three cards, so you can’t guarantee that you’ll name cards that are powerful enough to really benefit from the free cast. Who doesn’t want a Brainstorm, let alone two?

FLAREdirector: If I can’t read this card while on a computer, this is way to much text for an actual card. Seriously, you have 28 lines of text, you need to find a way to drastically rework the text or try something else. As for the card itself, I don’t think a Fiora-based set would have strong tribal elements, so this is 5 mana to effect part of your deck, and the effects are delayed, giving an opponent ample time to try to address this card.

kefke: This one’s probably my favorite card in terms of flavor, as it fits really well for a judge. The effects might not be strong enough, but it’s a really good idea.

temawimag: This is a pretty feel-bad rare, as it does nothing in the first couple of packs in terms of the draft, but the cost on ability of the card is pretty pushed (Arcane Encyclopedia for reference), so it’s overall pretty fine.

Flo00: This has the same problem as Ring of Spell Storing in that it can be a color pie break (you can cast wbr spells without paying their mana costs, so you can do direct damage, discard, etc. in green-blue), but the rate on this (effectively cast any three spells you want that aren’t in your deck) is really strong.

melono: This isn’t really a draft-matters card, but is a really good way to deck-thin in limited and is a pretty strong boost. I also like the hexproof bonus and how it interacts with the cards in your deck.

Boogymanjunior: This is a really cool, Miracle / Wish kind of card, but one that allows you to freecast a bunch of things for a relatively small amount of mana.

{Winners}
Our winner is CanterburyEgg, with kefke coming in really close as the runner up. Great job, and thanks for participating, everyone!

{Judging}
Phyreformer: I've found cards like this notoriously hard to judge in the past. There are so many different modes here that accurately assessing all of them would be a fool's errand. The effect is clever but slow, painful, and strange. Putting a -1/-1 counter on a land is a preposterous line of text that only works with this card, and at the end of the day the whole puzzle isn't interesting enough to make up for the complexity and absurdity of its pieces.
Blessed Stag: Interestingly, I think a lot of the importance of this card is in its rarity, which you've left out--but no matter there. I'll assume it's a rare. And it does a fine job at what it does, as a fat value engine. It's obviously very similar to Pelakka Wurm, and perhaps even a bit too similar, given that they fit basically the same form. Still a clean design despite that.
Scorpial Colossus: Odd name aside, this is just a clean design. There's not really much to say about it. The 3/5 body is already massive on a 3-drop, and deathtouch means it wins pretty much every combat step, so I'm hesitant about the power level, but there's no doubt that the triple-green casting cost is a drawback. Overall I'd say this is too strong but it would have to be tested to know for sure.
Mosscrown-Moose: I'm 100% certain the name doesn't need the hyphen. That said, I'm a huge fan of this design! It might not quite cost enough, and I don't really know why it's an enchantment, but the intrigue level is there for sure. I'd love to cast this, and the deckbuilding requirements I think make it even more fun. Well done.
Oxivore: I really don't think this card gets there. The triple-green in the cost is pretty obviously just to meet the challenge, and the effect is rather weak. Even in formats where artifacts are abundant, you rarely end up with more than three or four in your graveyard, and destroying Equipment will almost never come in handy. Overall, too slow, too weak, too narrow. Just a miss for me.
Brawn Trap: This isn't the world's most exciting card, is it? I think the effect feels awful at rare, though rarity isn't the end of the world here. This trap will almost never come into play during combat, which I think makes it quite a bit worse. (And if your opponent is playing 5-power creatures and then attacking, it's their own fault.) I would rarely put this card in a deck that wasn't monogreen, and I'm not convinced it pulls its weight there either.
Gigantopod: So the gimmick here is that creatures deal double damage to it, basically? It's interesting, I'll give you that, but I think it's WAY too fat. Even a 4/4 vigilance/hexproof for three would be a house and this would be on average better since it doesn't die to Languish/Pyroclasm-style wraths.

{and the winner is...}
ameisenmeister, for meeting the challenge and innovating at the same time! Congrats, and take it away!