The user lets out a defiant roar and is surrounded by green light. All enemies within a certain radius are forced to attack the user. If they ignore the call, they will trigger a powerful counterattack. This spell also increases defense of the user for a short duration.
- In a Q&A with Mamare Touno, he stated that if Anchor Howl and Castle of Stone are simultaneously cast, Anchor Howl's counterattack will still activate in spite of Castle of Stone's immobilizing effect.