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"So Harry, thinking that he would soon have had enough of the library to last him a lifetime, buried himself once more among the dusty volumes, looking for any spell that might enable a human to survive without oxygen. However, though he, Ron, and Hermione searched through their lunchtimes, evenings, and whole weekends — though Harry asked Professor McGonagall for a note of permission to use the Restricted Section, and even asked the irritable, vulture-like librarian Madam Pince, for help — they found nothing whatsoever that would enable Harry to spend an hour underwater and live to tell the tale."
— Description[src]
Cedric Diggory using Bubble-Head Charm for the Tri-wizard Tournament 2nd Task (Concept Artwork)

Cedric uses the Bubble-Head Charm spell to breathe underwater

Oxygen (chemical symbol: O) is a chemical element with atomic number 8. At the standard conditions for temperature and pressure (STP), oxygen atoms bind to form the diatomic molecule oxygen gas (O2), a pale blue gas with no smell or taste. Oxygen is necessary for most organisms, makes up 21% of the Earth's atmosphere and comprises most of the mass in water.

History[]

Humans can not survive without oxygen, and it seemed there were no spells capable of enabling humans to do so. The Bubble-Head Charm, however, allowed the users to breathe oxygen underwater.[1]

The use of gillyweed allowed one to process oxygen through gills.[1]

When they were investigating the magical creature that had attacked a Muggle landlord in a Welsh lake, Mathilda Grimblehawk and her partner found a clipboard with diving calculations on it; Mathilda referred to inscriptions like "O2" and "50m" as "a strange Muggle code".[2]

Appearances[]

Notes and references[]

  1. 1.0 1.1 Harry Potter and the Goblet of Fire, Chapter 26 (The Second Task)
  2. Fantastic Beasts: Cases from the Wizarding World - Case 4: Into the Deep, Act 2
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