Blood Moon says, Nonbasic lands are Mountains, whereas Urborg, Tomb of Yawgmoth says: Each land is a Swamp in addition to its other land types. The key difference here is the words in addition to. If you dont see this wording, like on Blood Moon, then the type change will overwrite whatever types the card had before
Its strange that there doesnt seem to be any attached social network, or the ability to rematch an opponent
Selvala, Heart of the Wilds is, however, the best of the bunch
Editors note: Its certainly a card whose presence is always welcome in my Vintage Cube drafts
While it is nice that we can get fast wins with a lucky draw, we rarely assembled the combo, instead mostly winning by building a big board of random creatures thanks to Nykthos, Shrine to Nyx allowing us to make a ton of mana and play out our hand quickly (or manifest a bunch with Mastery of the Unseen)