This General Grievous utilizes the universal fold to make a realistic General Grievous mask. In fact, if you use a really big sheet of paper and cut holes, it can become an origami costume. Body not included.
This was based off of a failed Darth Paper. It lacks the four arms or any type of body, but it looks realistic and cool once it's done.
Proportions: 1/4 or 1/2 horizontal sheet of paper
Start by folding the paper like this.