If Goldspan resolves, its very hard to remove from the board, especially in a deck like this
They're not token-makers, but Absorb Identity, Dire Mimic, and Mimic are non-shapeshifter cards that can become shapeshifters
Combined with Exploration or Fastbond, the Horn quickly becomes an engine from which you can draw three, four, five, or more cards a turn, at no cost
I'd start out with one or two tutors that can get your wincons, but if you start working your way up the power scale, having more will be necessary for keeping up with your pod
FromTheShire: They definitely have a graveyard/sacrifice theme between this set and the extant Chatterfang, Squirrel General, and this is a great piece if you're sacrificing your stuff a bunch