"The spell that is holding that door is a combination of a ward, to prevent spells from opening it, and a hard shield, to prevent from physical attacks. It will keep the door closed. And protected."

Hermione runs her fingers through Crookshanks fur, lightly.

"And I was fighting a Dementor. A Dementor are among the foulest creatures that plague my world. They glory in decay and despair, they drain peace, hope and happiness out of the air around them. And this particular Dementor was created by the cruelest of all cruel witches."