Wraiths, revenants, and souls.

[Lady Birb]

if the wraith can steal souls, can it sign traitor chaplain contracts

So a wraiths collected souls could also be given to a traitor chaplain in exchange for powers? Due to the way wraiths work, we would have to either:

1. Make the effects of the contract only apply to the wraith while it is a revenant or shadow avatar.
   
2. Make the effects apply to the shell the soul once belonged to, rather than the wraith itself
   
3. Add a completely different set of effects to contracts specifically for wraiths.
   

Alternatively, a wraith without any souls, due to the fact they literally are souls, could sell themselves to the chaplain, giving themselves the contract's effects but becoming a mindslave to the chaplain.