Umbrella Spell
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Magical effects
Newt Scamander raised his wand to create an invisible umbrella to shield himself from rain produced by his Thunderbird Frank (WFT). Read More
Unbreakable Charm
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Spells
The Unbreakable Charm makes an object unbreakable. Read More
Unbreakable Vow
— "wand actions and vow seal the magic"
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Spells
The Unbreakable Vow creates a magically binding vow between two people. The spell apparently cannot be performed using wandless magic (judging from Snape’s remarks to Bellatrix rather than from the Weasley twins’ underage efforts) and requires that the Bonder’s wand be touching the joined hands of the person administering the… Read More
Undetectable Extension Charm
— "Capacious Extremis (Pm)"
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Spells
The Undetectable Extension Charm extends the internal dimensions of the target object without affecting the external dimensions. Read More
Unforgivable Curses
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Spells
The Unforgivable Curses are three curses in particular that when used on another human being can result in a life term in Azkaban. These three curses were used extensively by Voldemort’s followers during his rise to power in the 1970s, and their use by Aurors against suspects was in turn… Read More
Unlocking Charm
— "Alohomora"
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Spells
The Unlocking Charm is a charm that causes a locked door to open. Read More
Unnamed Reviving Potion
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Potions
This unnamed reviving potion was used by mediwizards at the 1994 Quidditch World Cup to revive a victim of the Wronski Feint (GF8). Read More
Unplottable
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Magical effects
Unplottable is a term which is used to describe a magical effect on a place which makes it impossible for Wizards or Muggles to plot its location on a map (GF11), or even to find it if they go looking (OP6). … Read More Untraceable
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Magical effects
A witch or wizard can use magic to make themselves untraceable, that is, impossible to be found by magic. Owls can still find the recipient of letters, but no one could follow the owl to discover where that person is (JKR). Read More
Untransfiguration Spell
— "Reparifarge"
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Spells
The Untransfiguration Spell is the opposite of Transfiguration: it turns a creature or object back to its natural state. Read More