
Personally I think this card is great in the right deck. The most powerful creatures in vintage are rather demanding color-wise. The archetype is aggro of course. I remember variants of aggro control with cities and gems. For somebody who uses 25-30 creatures I think this card can be a very handy mana source.
I believe it should be used in decks with a lot of creatures though. For those who followed my gaddock theme deck, do you think this card opens more options concerning creatures from different colors. The more direct question would be; a 5 color aggro control were you can pick whatever creature you desire depending on your strategy.