The description for the chance to “Mark for Death on hit” (“Mark of Death”) has a double negative at the end of its description; “It cannot not stack.”, which would mean it would stack. A minute error, but hey - still an error. 
The description for the chance to “Mark for Death on hit” (“Mark of Death”) has a double negative at the end of its description; “It cannot not stack.”, which would mean it would stack. A minute error, but hey - still an error.