I'm thinking it should have something with Signy (and maybe Gabby too).
Pulling off Santa's boot as he goes back up the chimney?
An ornament or a snow globe with a castle motif?
Googling Santas and chimneys (or variations on the theme). Also snow globes, with a thought to either containing or reflecting the SH castle.
I really like this idea, with Signy pulling off Santa's boot. ;->
I need to do a notan drawing on the lights, darks & mediums.