Wow. Found here, a great trick, if a little uncontrollable. Start drawing a shape, say an arc or an ellipse. While the mouse button is down, keep dragging around and press ` (grave, under tilde, next to 1). Many shapes ensue.
If that’s a bit random for you, create a shape, then apply Effect > Distort and Transform > Transform, rotate by 12°, 14 copies. Click the New button in the Graphic Styles panel to save that as a graphic style. You’ll want a variation with 29 copies for asymmetrical objects or with 20 for something random in-between. Enjoy!