Most graphics on these pages were ripped from the games Heretic and Hexen, I just tweaked and edited and hueshifted and stitched together some things to make them fit better with what I needed. I mean, these games are old and I'm not claiming I've created these so I guess it's fine? I just think it looks really cool.
I did make some things entirely from scratch tho, such as the workyns (magic circle things -- or triangles also) on the main background and the little papers on the top of the main page.
Speaking of the top-of-main-page papers, you can see that pic below because I've put too much effort on that to never be able to see it unobstructed and I'm too lazy to inspect element for it every time I wanna take a peek.
And yeah those runes were made by 13 year old me and I use them till today because they look kinda cool.