Welcome to my Artober attempt. I likely will not get anywhere near all 31 done but going to attempt to do a few and practice a little! So here we go~

Prompts List
1.) Potion Bottles
2.) Hogwarts Express
3.) A Messenger Owl
4.) Wizarding Robes
5.) Brewing a Potion
6.) Starry Night
7.) A Wand
8.) The Great Hall
9.) Broom
10.) Bestfriend
11.) Patronus
12.) Slytherin
13.) Snitch
14.) Wingardium Leviosa
15.) Gryffindor
16.) The Ball
17.) The Ball without fire
18.) Giant Squid
19.) The Greenhouses
20.) Ravenclaw
21.) Centaurs
22.) Prefect (does not have to represent one of the present staff members but can, could be you in 2 years)
23.) Hogwarts Founders
24.) Hufflepuff
25.) Dungeon
26.) Professor (does not have to represent one of the present staff members but can, could be you in 20 years)
27.) Quidditch
28.) Sorting Ceremony
29.) Merpersons
30.) The Castle
31.) Hags

Status: COMPLETED!!!

Day 1 - Potion Bottles

Opted to create Serena's favourite potion at present time - or rather, the one that she thinks everyone should be drinking before each event (especially balls) or if they are a Hufflepuff.

Edit: added a second image with a few different potions lined up a shelf. The middle is a different style but rocking it. [Disclaimer: The middle potion uses lineart that I actually made before today. All I did today was colour it in and finish it off for this. The other two potions are brand new for today, though]

Day 2 - Hogwarts Express

My attempt at a train did not work out well, so I tried something else and opted for the ticket. Whilst designing, it seemed to have a Slytherin feel to it in the accents around the side so made it specifically for them!

Day 3 - Messenger Owl

I really struggled with this owl originally and coming up with the outline but I really like how it turned out so that's exciting. I did add shading, which isn't really showing through in the reduced size so... that's something to work on next time but it was fun!

Day 4 - Wizarding Robes

This might have taken way too long compared to what it probably should have done but I had a lot of fun doing the detailing. It's too big to upload as a .png so using the .jpeg version and hoping that it's still high res enough to see the details!

Day 5 - Brewing a Potion

Here's my cauldron to brew potions with... Totally did not vandalise school property, of course not! You see nothing @Aleksander Ostrowski.

Day 6 - Starry Night

Ignore the very obvious credit, I couldn't make it more transparent on paint >.> But here's my art for Starry Night! The colours looked a lot better on my tablet but alas, I can't get it to look that way on the computer so just rolling with it now.

Day 7 - A Wand

I created a line art of a wand that could possibly be Serena's. It's loosely based on a great design that Caradoc Browne did for me but not as cool as his I guess. I tried!

Day 8 - Great Hall

This is by no means perfect but I had a lot of fun creating this. Since the thought of drawing the whole room was way too intense, I opted to go for a zoomed in bit! The perspective is definitely off a little but ahhh, it was fun. Don't question the realism (or lack thereof) of the windows either! I'm just calling it magic. And yes, totally used the night sky I drew the other day for this... cough. The lineart is the main part though!

Day 9 - Broom

Alright so Serena technically has a Silver Arrow but her dream is to one day fly or create a better broom than the Firebolt. So figured I would dedicate the day to that instead.