[Another Japanese demonic entity re-imagined as a kyton for the purposes of the Pathfinder RPG. How could it not be, as a severed head impaled on a flaming wheel?]
Wa-Nyūdō A flaming wheel the size of an ox rolls towards you. Impaled on its
spokes is an enormous head with lolling eyes and chattering, razor-sharp
teeth.
Although the sinister outsiders known as kytons prefer to indoctrinate
willing converts to their philosophy of pain and mutilation, there are
those whom they select to be “forcibly rewarded”. The hideous wa-nyūdō
are the collection agents of the kytons, tasked with retrieving mortal
assets and dragging them back, alive or dead, to the Plane of Shadow.
Fanatical zealots, wa-nyūdō have discarded almost all of their humanoid
forms, leaving nothing but a hateful, leering head. Wa-nyūdō have
chassis of wood, metal and bone built to hold their heads and give them
phenomenal speed.
Wa-nyūdō are typically found on the Material Plane on a mission of
retrieval, but they often take detours to torment and destroy mortals
besides their targets. Wa-nyūdō take delight in focusing their attention
on those who pay attention to them, punishing their victims for the
sins of curiosity and fear. In combat, a wa-nyūdō is constantly mobile,
rolling over opponents and setting them ablaze before returning to
inflict deep, bleeding wounds with their fangs.
Wa-nyūdō act as servants to the kytons of Senksen. Their command of flames makes them useful combatants against creatures like white walkers and frost giants.
Shores of Swords 