Forum talk:Neekerivittu/@comment-86.97.134.120-20130301150226/@comment-6301771-20130302215352

Death Mark checks all damage that would be dealt to the target over its duration. It does not proc any of the effectst that spawned those damages. BotRK will not prock on Death Mark, and the damage Death Mark will deal is equal to a % of the damage BotRK dealt on hit. Given it doesn't grant much AD and Zed doesn't get all that much use out of the passive, I'd say BotRK is a miss on him.