• Rules and laws Gamp’s Law of Elemental Transfiguration is a fundamental property of magic which identifies what can be conjured and what cannot. Generally speaking, this axiom states that one cannot create something from nothing. Read More
• Creature The largest invertebrate known to Muggle science, the giant squid can grow to 70 feet in length. While the giant squid is a deep salt water creature, at least one giant squid lives in the freshwater lake near Hogwarts castle, and seems to be more or less friendly toward the… Read More
• Food and drinks • Glossary 1920s North American slang for alcoholic beverages. The magical variety actually causes the drinker to giggle.  … Read More
• Food and drinks A drink served at the Three Broomsticks in Hogsmeade. Read More
• Plants Gillyweed is a water plant native to the Mediterranean which looks like a bundle of slimy, greyish-green rat tails, and has magical properties that allow its consumer to breathe underwater. Read More
• Hogwarts castle and grounds • Lakes and marshes A large, freshwater lake (a loch, actually, since this is Scotland) lies to the south of Hogwarts castle, which stands on a cliff overlooking the water. The lake has a number of very unusual inhabitants, including a giant squid, a village of merfolk, and many grindylows. The lake is approximately a half-mile in… Read More
• Creature Grindylows are found throughout Britain and Ireland, including the lake on the grounds of Hogwarts in Scotland. Pale green in colour, these water demons have sharp horns, pointed fangs and brittle spindly fingers. Grindylows show aggression towards humans, wizards or Muggles, but merpeople have been known to domesticate them. Read More