If you are wounded in the mysterious underworld you may become infected by a small parasitic tree. These tree sprout from the back and shoulders like tiny bonsai. They eventually bear fruit of many colors and flavors that look a bit like plums. Each fruit is a secret of the host that is then lost to them. Memorized spells, locations of buried treasures, magical passphrases, simply gone from the memory. If someone other than the host eats one of the fruit, they gain one of those lost secrets.