Mythical Creatures- Griffins, Thestrals, Acromantula, Basilisk, Boggarts, Centaurs, Dementors, Ghosts, Giant, Goblins, House-elves, Obscurials/Obscurus, Werewolves, Fairies, Gnomes, Imp, Mermaids, Phoenix, Unicorn, Sphinx, Troll. In mythology their is mythical creatures and in the Harry Potter books/movies you see strange mythical creatures as for the list above is only a few of the ones that are in the books and/or movies.
Magic Spells- Accio, Aguamenti, Alohomora, Avada Kedavra, Bat-Bogey Hex, Bubble-Head Charm, Caterwauling Charm, Cheering Charm, Colloportus, Confringo, Confundo, Crucio, Descendo, Diffind, Disillusionment Charm, Engorgio, Episkey, Evanesco, Expecto Patronum, Expelliarmus, Homenum Revelio, Impedimenta, Imperio, Impervius. These are some of the spells that are used to attack your opponent. You use these spells with the wand. In mythology their is some sort of magical element that is used. In the HP books they mostly use spells and charms. Of course there are so many books that the list above is only a few of the ones.
Potions- Draught of Living Death this potions is that the person goes into a deep sleep so strong that they appear to be dead. Felix Felicis is commonly known as liquid luck. Polyjuice Potion is the potion that makes the person change appearance of someone else. Amortentia is the strongest love potion. Elixir of Life "is a potion produced by using the Philosopher's Stone that extends the life of the drinker."
Ingredients for the potions- Angel's Trumpet is a flowering plant and every part of it is poisonous. Bloodroot is a flowering plant and it can kill an animal's blood cells. Death-Cap is a poisonous mushroom. Unicorn blood- if the death of the unicorn is upon the killer whoever drinks the blood will be cursed. Dragon blood- has a number of magical properties. Rat tail- is a potion ingredient used in the Hair-Raising Potion.
Wands- magical instrument through which a witch or wizard channels her or his magical powers to centralize the effects for more complex results. Most spells are done with the aid of wands, if you do charms or spells without the wand it requires more concentration and skills. The wand normally will chose the wizard or witch not the other way around. Each wand consists of a specific type of wood that surrounds a core of magical substance. Although the wand cores may come from the same creature, or the wood may come from the same tree, no two existing wands are exactly alike
Quidditch- "is a magical competitive sport involving flying contestants. Matches are played between two teams of seven players riding flying broomsticks, using four balls: a Quaffle, two Bludgers, and a Golden Snitch. Six ring-shaped goals are situated atop poles of different heights, three on each side of the pitch. It is an extremely rough but very popular semi-contact sport, played by wizards and witches."
Hogwarts- "is a large, seven-story high building supported by magic, with a hundred and forty two staircases throughout its many towers and turrets and very deep dungeons, a good example being the moving staircases." The Chamber of Secrets was allegedly created deep under the dungeons of Hogwarts Castle. Moaning Myrtle's bathroom is on the second floor. In order to gain entrance one must say "open" in Parseltongue and a sink will open into a slide. "The Grand Staircase is a massive structure in Hogwarts Castle, mainly used to access each floor of the castle, including the dungeons. There are hundreds of Portraits covering the walls in this tower, some of which conceal secret passages to other areas within the school."