Hello and welcome to my instructable. This is just a special kind of ninja star!!!! It makes about 15 minutes to build this thing when you have done this more often, and about 25 minutes if you do this for the first time.
Step 1: Paper
You can use all kinds of paper, it doesn't have to be origami paper, but just take care that it is a square piece of paper.
Step 2: Second Step.
Fold In Half Horizontally.
Step 3: Third Step
Fold all the points to the middle.
Step 4: Forth Step.
Just follow the pics, I just don't know how to explain this.
Step 5: Fifth Step.
You will end up with the first picture in this step. Just fold the top-triangle to the back, and then turn the whole thing around.
Step 6: Sixth Step
The finished piece!!! You will have to repeat all the steps 15 times extra and than continue to the next step.
Step 7: Seventh Step
Put them together in the way the pictures show you. You just have to continue in the way I have shown you in the second picture until you get a circle as middle. (I hope that this is clear enough, otherwise just ask your question using the comments)
Step 8: Another One...
Just another picture of one of my dragonstars.