I would advise against crating the Vetruvian Grandmaster, he is really slow and just not worth using at 8 mana. If you really need a lategame threat as Vet, Aymara healer or Cataclysmatic fault are much better than Grandmaster Nosh-Rak, although it is worth mentioning that neither of them are auto-includes.
Personally, I would probably build a larger collection of Commons, Rares, and Epics before jumping to Legendary when you get some more spirit since Vet lacks any game changing auto-include Legendaries (unless you want to play Golem Vet which requires Sirroco).