"Protego Maxima. Fianto Duri. Repello Inimicum."
—Hogwarts castle is magically fortified[src]

Fianto Duri is a charm that was created to be combined with protective spells (Can be used with another person's shield spell)(When used on something else creates a explosion). As we already know the (i.e.) Shield Charm needs the caster to stay focused on the spell in order to continue protecting him, so Fianto Duri allows the caster to keep a charm "alive" while he does some other work or casts some other spells.


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's effect is most likely one that, when combined with the other two, bolsters the strength of the shield itself against extremely powerful spells; this is unlike minor shield spells, which only block weak hexes and curses. Given its etymology, it is likely this spell causes a solid barrier to be made out of spells such as Protego Maxima.

Known uses


Snatchers being disintegrated by the power of this spell combined with other protections

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 Eaters, on Voldemort's command, started bombarding the magical protection with spells, and it was ultimately brought down by a spell cast by Voldemort. In all probability, it is a spell calling for great power and expertise for its correct execution.

Known Casters


  • The incantation is derived from the Latin "fiant", meaning "done" and "duri", nominative masculine plural of durāre", meaning "to last" or "continue"; altogether the incantation means "that what has done lasts".

Behind the scenes


Notes and references