Grim Reaper

This Grim Reaper is both scary and cute! It is from a single square using the classic Frog Base. There is a bit of pulling flaps out and wrapping layers around, so you should be comfortable with steps like
that. This model has a "high intermediate" level designation. Diagrams for this can be found in the book Spooky Origami:

https://origamiusa.org/catalog/products/spooky-origami

A single square of very large kami or foil paper is recommended (15"/38cm). With more practice you can use smaller sheets.