A wave of death magic hit the castle in a massive blast, a white barrier came to life from the attack, blocking it entirely. Then a wave of Dementors came towards the castle, only to be stopped in the air as they neared the barrier. Their screeching was grating on my ears and I couldn’t hold the wince. Avalon pulsed the barrier a little, evaporating the Dementors. The castle couldn’t properly respond to the attack because of the invisibility spell.