Ilomba is a sea snake with destructive powers in the mythology of the Lozi people of Zambia. It is provided by a witch doctor. Usually it is fed with eggs and porridge in the morning. It takes on the identity of the person that owns it. If it is killed, the owner feels the pain, and then dies. If the owner dies, it dies. The only way it can be destroyed is through the witch doctor.
References
Ilomba Wikipedia(Text) CC BY-SA