A Morsus is a type of poison, created by the Sorceri. It is unique as it has a delayed effect, cause a withdrawal type effect that leads to death without regular doses. Each morsus has a specific antidote which will cure the delayed death. A morsus will cause the appearance of "X"s on the backs of the victim's hand, a condemning.
Morsus are usually used to enforce the return of an unwilling assistant.