This clip from Duke Harper is pretty clear on the steps required to go from a formless piece of paper to an adorable, existence-questioning mystical horse.
I have one recommendation though — mute the sound. The background music is beyond terrible.
Purists will scoff at the use of glue, but if it means a stronger, more resilient unicorn, what’s the harm?
There are other video tutorials available, however, they differ noticeable in design to the one featured in the film.