Hidden unknown piece in Ninjago

Joefish

I don't know if it's been noted before, but if you have a pair of those soft gold triangular shuriken, don't throw away the sprue block they come on. The centre block features a hollow anti-stud, and can attach to studs as some sort of 4-legged gold parasitic bug, or possibly a Spider-Man tracer bug.

Aidypie

I agree. Makes an excellent greeble for the sides of control panels and ships.

Aanchir

Yep, I noticed that when I got my first Airjitzu sets back in May! I was on the LEGO Inside Tour at the time and actually brought this up with some of the Ninjago designers on the tour with me. They mentioned that it wasn't actually meant to function as an anti-stud, and that it was just a happy accident (one which probably wouldn't have transpired if it had been made of a harder material with less flex).

It's not the first time that a sprue has just happened to have other uses or connectivity, but it's one of the most significant I've seen since it's a part that could make such a nice gadget or greeble.

BrickDancer

^I like keeping green sprues for use as vines.