Six years later, after the capture of Kholinar by the Voidbringers, Jezrien was stabbed by Moash with a raysium knife.

Who does Moash kill?

During the siege, Moash killed Elhokar whom he impaled with a spear through his chest. Khen was witness to the killing. Killing Elhokar, however, only left Moash feeling cold rather than satisfaction. Later, while still in service of the Fused, Moash kills Jezrien in the Kholinar palace gardens at their behest.

Who did Moash kill at the end of Oathbringer?

Moash then used the knife to kill Jezrien. After the murder, Moash removed the knife from Jezrien's body, but the subsequent fate of the knife is unknown.