Answer:
It pursues wrongdoers at night and punishes them when nails are driven into it.
Step-by-step explanation:
It helps to keep order of the Kongo people.
It embodies an ancestral spirit who will hunt down sources of misery and destroy them and hunt down anyone who has taken a vow, oath or contract and who hasn't kept that promise.
A nkisi nkondi can act as an oath taking image which is used to resolve verbal disputes or lawsuits (mambu) as well as an avenger (the term nkondi means 'hunter') or guardian if sorcery or any form of evil has been committed.