Bats and Pumpkins
This one features the traditional colours and also bat charms and pumpkin charms. It's 168 m / 112 g
This one is already listed, you can read about the details here.
Also, there are these two - not Halloween yarns as such, but the colours fit the theme somewhat and I'd like to show them because I like them a lot :-)
This one features hand dyed bluefaced leicester wool and silk as well as merino wool - and semi-precious stones (fiery red agate, carnelian, and citrine) strung onto a shiny orange thread. 251 m / 113 g
Friends of Slytherin
This is one of my recent favourites - I absolutely love the snake charms. I've been meaning to spin another Slytherin yarn for a long time now, but it took me a while to find suitable add-ins. This art yarn is sparkly (silver angelina) and features wild silk, alpaca, linen and merino wool. Also, I spun in silk fabric strips and beads. 112 m / 95 g