Ten-chan carries Eternal Ice sealed into the form of a fountain pen. At the command "Breathe, Eternal Ice!" it transforms into a cute, heavy nodachi with a blade a little wider than normal. It allows the wielder to sprout fangs and claws akin to the animal embodied in the weapon (usually signified by a likeness on the pommel, an engraving in the handle, haft or an etching on the blade/hammer).