This is Gleipnir, by Lanja Sámsdóttir. I’m using the leftover Tess’ Designer Yarns Superwash Merino Lace in the Maine Woods and Waters colorway.
This has been interesting so far – it’s true lace, so I’m having to work the pattern across the back as well. There are a fair number of p2tog through the back of the loop – they’re definitely variable in ease.