Kumite! Bloodsport of Champions!
You've has been invited to the Kumite¸ a bloodsport tournament of the planets greatest warriors!
An invitation always appears as a letter from a masked man slipping out from the shadows. You've been invited to Aishanga¸ a tropical island in the lake of souls that only appears under a full moon. The kumite has always existed. It will always exist. To those invited¸ the boatman will always appear on the shore to take them to their destiny
A mid-high level "recurring sidequest" for your LotFP party.
Cover image¸ historical photograph. Source unknown. 19th century.