You have to play this mode thats basically endless stages, which is accessible in the safe hub or whatever ( you find it by heading right when at the bridge area near the missions), you then pick which monster to pick, (not sure if required but i mostly pick wolf) then in later stages you will find a cluster of vines that take a lot of hits, destroy it and you will get the wolf pelt, then you wait untill you get the line about wolfs howling then start heading to the start point and a big wolf will attack you, get close to her to get the scene.