Research:Ninja Belts & Headbands
Inazuma: With a total of 6 inhumes I couldn't buy the black belt. Inhumed Thursday 4 times, Dibhala and Fivespoon once. Possibly it's the number of different people, possibly the number of players inhumed..
Inazuma With 5 unique npc contracts, black belt comes available... Incorrect. Possibly 5 ninja inhumes or unique ninja inhumes.