Seems when you proc the death effect everything you mark with mark for death starts going boom. Seems that is the theme this PTR.
I dont get it how it is working, the shadow seems to have a cd, how are people able to rush it in 4mins when u always have to die for it to reset ?
It has something to do with spawning a clone of yourself that can deal insane damage.
It is simple. If you get a big open map you just pull as many elites as you can and kill them. As long as you are good at targeting in packs you can kill quite a few in just 2 or 3 deaths. Bonus if they are champions as you only have to kill one target. The Clone will attack whoever you target with marked for death.