From publisher blurb:
This is a Print and Play Creature, with an interesting backstory from the first person who sighted it.
Just adapt the mechanics to your favourite game system. Interpreting the story.
The best thing... you won't find these creatures in any existing bestiary, so your players will face something really new.
There’s an annotation page for you to print on the back to input your own ideas and precise mechanics.
This is the first step. Get inspiration from it to create the big thing that will give your players the best experience ever!