The Ninja Battle Morpher is a combination transformation device and weapon used by the Ninja Steel Rangers. To morph, they must lock their Ninja Power Stars into the middle and spin them.
The Ninja Battle Morpher is able to double in size and change into three different Attack Modes, all marked with their respective kanji: Blade Mode, a short sword; Bow Mode, which allows any Ranger to fire energy arrows; and Claw Mode, a tri-claw designed for swift stabs. The fourth is Morph Mode,which allows them to morph to their Ranger form by calling out "Ninja Spin!" before spinning the Ninja Power Stars.
It was originally announced as the Ninja Star Morpher at Power Morphicon 2016.
The morpher mode prop is actually the Japanese toy release. Thus, one is not actually able to spin the Ninja Power Stars in place. The Power Rangers version of the toy, however, can be spun, though it does not include a Bow Mode.