Summons a large protective barrier Protego Maxima is a stronger
version of the Shield Charm that, when cast in combination with
Fianto Duri and Repello Inimicum, conjures up an almost
impregnable magical protection barrier. Bodies crossing the
boundaries of the barrier disintegrate on the spot, while spells
cast at it (if not of enough power to break it) create large,
resonating explosions. This spell is the core of the shield
summoned around Hogwarts; it is the shield itself that is seen
descending over the castle. - This spell was cast by Headmaster
Albus Dumbledore to protect the boundaries of Hogwarts Castle
from the Death Eater forces in the early hours of 1 September,
1996. Indeed a Death Eater tried to cross the barrier on a broom
but was repelled by the shield. - This spell was cast by Charms
Master Filius Flitwick to protect the boundaries of Hogwarts
Castle from the Death Eater forces in the late hours of 1 May,
1998, prior to the Battle of Hogwarts that started at midnight
the next day. The Death E