While taking shelter from a freak tornado, Spike and the Cutie Mark Crusaders take shelter in a mysterious blue box that winds up in the middle of the Everfree forest.
Timber wolves, creatures of the Everfree forest. They're made of sticks and dark magic, but who made them? It was centuries ago, before the three ponies tribes were even dealing with the Windigoes...
The humans that keep being displaced into Equestria don't know the rules of the Everfree very well. The local timberwolves are all too happy to educate them.