Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 5/5 Interesting variation on a board sweeper.
Follows criteria: 5/5
Flavor: 3/5 The name is slightly dissonant with the mechanic, but pretty good. It just doesn't feel like a legendary, though.
Total: 43/45

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 4/5 it's almost like a remand, only less forgiving.
Follows criteria: 5/5
Flavor: 2/5 A little bland, but given the precedent, understandable.
Total: 41/45

Elegance: 23/25 that "other" doesn't make sense.
Balance: 5/5 this is riding the edge, imho. just thinking of momentary blink and this makes me shudder.
Ice-cream-hat-on-a-pug-ness: 4/5 Feels rather similar to Voidmage Apprentice
Follows criteria: 5/5
Flavor: 4/5 The flavor text is a little off; I think if you had left it at I can still hear your thoughts. it would have been better.
Total: 41/45
Additional comments: Most of the time this will counter one spell, and that is kinda boring.

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 5/5
Follows criteria: 5/5
Flavor: 5/5 So well tied into the mechanic, and who doesn't love a phyrexian callback?
Total: 45/45
Additional comments: I miss this side of black.

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 5/5 I think part of the appeal of this card is the idea of a deck running only grizzly bears.
Follows criteria: 5/5
Flavor: 2/5 The name is dissonant with what it actually does. If it was "Decadence Deathdance" It'd make more sense, but as is the card seems to say, "Everyone was too complex,and so they died." which is nonsense.
Total: 42/45

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 5/5 This looks like a lot of fun to play with.
Follows criteria: 5/5
Flavor: 2/5 I suspect this one either went over my head, but the flavor text doesn't make sense. Also, it's bad form to use modern appliance words in card names, esp. artifacts.
Total: 42/45

Elegance: 25/25
Balance: 5/5 Such a narrow casting window!
Ice-cream-hat-on-a-pug-ness: 5/5
Follows criteria: 5/5
Flavor: 4/5 It could use a little more context, either in the name or in the flavor text, but otherwise it is very tightly constructed.
Total: 44/45

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 5/5
Follows criteria: 5/5
Flavor: 3/5 Rather bland, but evokative.
Total: 43/45

Elegance: 23/25 I now know that those numbers follow a sequence, but they are still kinda ugly, especially to the uninitiated.
Balance: 5/5 A bit like casting Traumatise on yourself, but okay.
Ice-cream-hat-on-a-pug-ness: 5/5 I am curious to see what sort of reanimator would use this card.
Follows criteria: 5/5 You're cutting it close, and you know it.
Flavor: 5/5 I would really have loved to see more done with this in mind, though it ties in well with the mechanic.
Total: 43/45

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 4/5 This is kinda lackluster. The intent is half there, but I think it would do better with a longer word count.
Follows criteria: 5/5
Flavor: 4/5 The name and the flavor text are disjointed, but each corresponds to a part of the card's effects, and I can respect that.
Total: 43/45

Elegance: 18/25 Reach doesn't make sense for a bird, and the main ability is kinda cobbled together.
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 2/5 This is similar to Drelnoch and Aven Fisher and doesn't do anything interesing.
Follows criteria: 5/5
Flavor: 0/5 It felt like a playtest name, and had nearly no relation to the rest of the card.
Total: 30/45

Elegance: 20/25 It really doesn't have much going for it, though it does lack undue complexity
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 3/5 I get how this could be exploited, but it doesn't show much creativity.
Follows criteria: 5/5
Flavor: 5/5 I rather like the idea of saps drifting across the multiverse, with pure fungal tenacity and witlessness.
Total: 38/45

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 5/5 While it is similar to about a million manafixing/accel artifacts, it does so in a novel way.
Follows criteria: 5/5
Flavor: 5/5 This card is tight. Name matches mechanic matches flavor and is a nice call back.
Total: 45/45

Elegance: 25/25
Balance: 5/5 I would play this in every deck, but it costs just enough to keep it from being broken.
Ice-cream-hat-on-a-pug-ness: 5/5 Assuming that the rigger set ever comes out, this seems like a very reasonable component.
Follows criteria: 5/5
Flavor: 5/5 Epic, and implying even more.
Total: 45/45

Elegance: 25/25
Balance: 5/5 I thought it was a little iffy, but the damage clause keeps it balanced.
Ice-cream-hat-on-a-pug-ness: 5/5
Follows criteria: 5/5 Once again I was conflicted, but...
Flavor: 5/5 The flavor really pulls it together. I thought it didn't feel like a basic card, but as intentionally impassable terrain, and surrounding yourself with the snow deserts it works quite well.
Total: 45/45

Elegance: 25/25
Balance: 5/5 The number of UM's necessary for critical mass is nicely done.
Ice-cream-hat-on-a-pug-ness: 3/5 This is not that different from the other Urza's lands.
Follows criteria: 5/5
Flavor: 2/5 It's an okay reference, but not much beyond that.
Total: 40/45

Elegance: 25/25
Balance: 5/5
Ice-cream-hat-on-a-pug-ness: 4/5
Follows criteria: 5/5
Flavor: 3/5 Mirage connotates a certain insubstantiality that is lacking here.
Total: 42/45

Elegance: 21/25 see below
Balance: 3/5 I can sorta see what you are trying for, but the wording is ambiguous. As is, you can dump an entire hand of basic rats once the one in play becomes untapped. A better alternative would be ":t:: Put a basic rat from your hand onto the battlefield." Also under the current wording, assuming a favorable draw, you could have 7 1/1's by turn two.
Ice-cream-hat-on-a-pug-ness: 5/5
Follows criteria: 3/5 It does use basic to good effect, but it is not balanced accordingly.
Flavor: 4/5
Total: 36/45

Elegance: 25/25
Balance: 5/5 This is cutting it pretty close, but the fight clause keeps it form getting too out of hand.
Ice-cream-hat-on-a-pug-ness: 4/5 Ordinarily, this would get a 5, but the post above yours is very similar.
Follows criteria: 5/5
Flavor: 4/5
Total: 43/45