Two creatures, forever cycling between the phases of the 5 elements, unable to rejoin.
The unnatural offspring of a zombie father and a human mother.
The excited, almost frantic sound of a mallet instrument erupts from the forest to your left. Within minutes, your party is confronted by a host of short, sprite-like gnomes clad in vivid greens and earthy browns. Attempts to communicate fall flat. The gnomes seem to ignore your words entirely, and you cannot understand the humming/whistling/snapping that apparently makes up their language. Luckily for you and your fellows, however, they don't seem hostile . . .
In a city where the justice system features judicial dueling, plaintiffs and defendants are permitted to request a champion to take their place in the duel: Someone chosen by lot from among the foreigners in the city. When anyone first arrives, they are given an enchanted ceramic pendant that marks them as a candidate for "court duty".
Wealthy folk entering the city are often escorted by burly guards, paid to carry pendants on their behalf: They elude court duty in that way.
Adventurers may seek work as a rich man's proxy or may find themselves magically summoned to serve as a champion.