As an long time D&D geek, I can’t believe how hard it is to find a displacer beast costume on the Internet. So inspired by one of my favorite t-shirts (Displacer Kitty Wants a Hug!) I designed some fleecy tentacles that I could wear under my shirt. Combined with a tail and some ears, the result is a pretty cute Displacer Beast-girl (if I say so myself).
You can read my Instructable here. Let me know what you think or if you make a set of tentacles for yourself.