Fenriswolf, Curse of Æsir

If Damage would be dealt to Fenriswolf, put that
many chain counters on it instead. As long as
there are chain counter on Fenriswolf it isn't a creature and gains indestructible.
At the beginning of your upkeep remove a chain counter. If a counter got removed that way each opponent creates a 0/0 Wolf creature. Goad each
Wolf you don't control.
Other Wolf and Werwolf creatures gain +X/+1
and Trample. X is equal to chain counters on Fenriswolf.