This is a supplement I made for the wonderful Ninja City by Joey Royale (Get Haunted Industries, DCC compatible). It is a funnel, in which players control a group of 3 street kids going through a series of trials, in hope to be chosen by a mysterious sensei & become an authentic Ninja Warrior!
https://martin-ouellet-headcheese.itch.io/the-crucible
Source: itch.io