How did the Half-Blood Prince invent Sectumsempra?
55229
Can wizards create their own spells?
97151
Where did the notion that Werewolves and Vampires are at odds originate?
140900
Can you create more Polyjuice Potion using hair/clippings from your own transformed self?
98864
How to create Quarter Cylinder
109789
How did Thranduil know about the 'infamous' Strider when the latter was only 10 during the Battle of the Five Armies?
82858
How was the Cloak of Invisibility Created?
19001
How did the dead recover Viserion?
116038
How exactly does lycanthropy work?  Does it mix with vampirism?
21120
How Was the Batcave Built in Secret?
140243
Where did the "Memories transferred through DNA" idea used in Assassin's Creed come from?
72758
Has JKR ever talked about the inspiration of creating the Horcrux idea? Is it related to the One Ring?
12123
How do Horcruxes work?
52635
Was the whole changeling/Dominion plot planned from the beginning?
115112
How was Hedwig able to find Sirius?
157709
Why is Harry Potter a half-blood?
113337
What good did Snape do anyone by infiltrating the Death Eaters?
51101
How do I cure Sanguinare Vampiris?