Other Wolf and Werewolf creatures you control get +1/+1.
Werewolf creatures you control that aren't Humans can't transform."
Ever since Maro spoiled the fact that Avacyn Restored was no longer going to feature double-faced cards, my guess was that a line of text on Avacyn's card would read: "Creatures can't transform." I don't know if Everwolf devalues my guess or not, but this new wolf is certainly interesting. It's basically the werewolf card that the werewolf tribe has needed.
There's nothing complicated with this one, folks. You stick this card in with a bunch of werewolves and hope its enough. It's important to note that this now because the 3rd "lord" werewolf card, along with Mayor of Avabruck and Full Moon's Rise. There really isn't that much more to say.