MTG's Tarkir ... you can play those cards. This deck can generate massive value out of nowhere, and thus, is going to be a lot of fun to play too, I think. What would a Blue/Green/Anything deck ...

MTG's head designer has explained the decisions behind the Spider-Man set's creature types. Norman Osborn's DNA was altered to turn him into Green Goblin, hence being given the goblin creature type.