Yep, this is as Mythic as it gets. Perfect place to reprint it, too. Mythic rares should be (1) iconic, defining the spirit of the set by portraying some really important character or item or event, (2) unique or nearly unique, in some gameplay-defining way, and (3) absurdly mana-overcosted, so that they are bombs in draft and fun to play in casual, but not the new $100 must-have-to-play-in-constructed-tournaments card.
Mythic cards don't need to be good; they need to be awesome. And, Urza's Rage is a perfect example of a not-good awesome card: an effective CMC of 12 is not good, but 10 uncounterable unpreventable damage is awesome.
Three uncounterable unpreventable damage for three mana isn't bad, but personally I'm more terrified of the fact that if you make Urza mad he will channel 
of HAAATE at you at instant speed.
Don't make that dude angry. You won't like what he does with his four Black Lotuses when he's angry...
Posted By:
Salient
(2/17/2012 3:03:41 PM)
Banefire = cost 4 mana for 3 damage, sorcery speed, and cannot be countered/prevented at 6+ mana.
Urza's Rage = cost 3 mana for 3 damage, instant speed, cannot be countered, and cannot be prevented at 12 mana.
While Rage lacks variability in terms of how much damage you do or how much mana you spend, it's a solid card. If you have two Banefire in hand, you may be able to kill your opponent in two turns but it would leave you tapped out, whereas Urza's would allow you open mana to react should opponent plays something dangerous. Don't forget Urza's Rage can't be countered right from start.
Banefire for straight burn, but Urza's Rage is probably a better choice for counter-burn variant as a finisher.
Posted By:
Cyberium
(8/3/2010 8:02:35 AM)
for a bolt that cant be countered is playable. And if the game gos into triple overtime then it could be a K.O.
Hint, run with Koth of the Hammer. 6 Mountains + Koth = style.
Posted By:
TheWrathofShane
(3/9/2012 3:06:28 AM)
You idiots. Coalition vs Phyrexia isn't a core set. The reason this is mythic is because it's one of the foil cards on the front of the box. Same with Phyrexian Negator.
Posted By:
syrazemyla
(10/16/2010 10:52:41 AM)
Looks like with Urza dead, Uncle Sam is the Coalition's head pyromancer. I give props.
Posted By:
Kryptnyt
(4/2/2010 5:34:04 AM)
Practicality: 0/5
Epicness: 10/5 because it's f*cking Urza!
Posted By:
GolgariLichLord
(12/18/2012 5:27:29 PM)
This... this used to be a really good card. Back in the day. This and Hammer of Bogardan mumble to themselves in a dark, lonely corner somewhere about how they used to be cool.
Posted By:
Gishra
(9/10/2010 9:12:55 PM)
"U mad Urza?" - Phyrexian negator, last words
Posted By:
adrian.malacoda
(5/9/2012 9:59:22 PM)
Oooops. LoL I KINDA over-looked Volcanic Fallout the last time I commented on this :p
Another Force-proof burn spell, at the same mana cost. Fine fine everybody else was right, this is not 'the best red card in Magic'. just very good. and shiny. Fallout DOES get played in Legacy/Vintage, and I think if it didn't exist, then Urza's Rage Would get played for being Uncounterable.
Posted By:
DarthParallax
(6/3/2011 2:26:44 PM)
This is really a cool card, but I personally think it's really horrible. 3 damage for 3 is already bad, and paying 12 to do ten damage just is waaay too much. For red, if you haven't won by the time you can play this card, it's pretty much over for you against any aggro, and control will probably already have a grip on your balls. I think this would only be decent back when games were a lot slower paced.
Posted By:
EvilCleavage
(8/4/2010 12:27:01 AM)