Boomerang Spiral (スパイラルロッド Supairaru roddo) (Spiral Rod in the fan translation) is a technique used by Angela in Trials of Mana. She learns this tech only when she class changes into a Grand Diviner. This tech allows her to swing her staff around her body before hurling it at a selected target, inflicting heavy amounts of damage in the process.
Angela will start off by bending a little to the back, whereupon she will begin twirling her staff from behind. She then hurls the staff at the selected target, which will continue swiveling about its axis for a few more rounds. The staff will then promptly sail back into Angela's hands.