Lyra stopped screaming as she made it through to the next door. She tilted her head to the side as she noticed something white floating lightly in the air but the negative thoughts hit her like a ton of bricks. She wanted to cry but..."no...No...NOOOOOOOOOO!" She was determined! D-E-T-E-R-M-I-N-E-D!

"Expecto Patronum," she said as she pulled her wand from her robes, aiming it at the boggart. A shield casts from the end of her wand, straight for the dementor and holding it back so that she could reach the next doorway and exit.