Urborg is already a Legendary Land.
I really feel like they are trying to push g/w into some form of control deck for this set. I'm half tempted to try it. The biggest problem is no spot removal.
Anyone wanna try helping with the brew lol
Tragic Arrogance
Nissas revelation
The great Aurora as a 1 of
Mastery of the unseen
Dragonlord Dromoka
Elspeth Suns Champion
Gaes Revenge
Den protector
Deathmist raptor
Courser of Kruphix
Nissa
The idea is to get a ton of permanents out with Deathmist, Den protector and Mastery to keep you alive to the late Game where you play cards like Elspeth to get a ton of tokens and Mastery activations then play the great Aurora and beat them with card /land advantage. Since you are the deck built to have more lands and creatures that enter the battlefield that draw you lands. This is all theory of course but it sounds incredibly fun.
Also I know I'd you have a ton of tokens and Elspeth that you're probably winning that game anyway =)
All possible cards
I really like the synergy between Deathmist raptor and Evolutionary Leap as well