Protego Totalum is the incantation of a protective enchantment that creates a large bubble shield which absorbs all projectile-based spells, blocking both inbound and outbound projectile spells.
To break this enchantment, it takes 3 uses of Aboleo. It may also be destroyed through the use of other spells, but more casts of these spells will be needed.
Its counterpart, Protego, can be used to block a smaller area, or just one person. Though, it will only take 1 cast of the spell Aboleo to abolish the shield.
This spell was also taken from the popular series, Harry Potter; it is an incantation used to shield a certain area or dwelling for an extended period of time.