You beat me to the punch! I had been planing on using some simmilar ideas, that of chaos skills that had unpredictable results, to my Slayer class but youve done it so well it would just look like a cheep knockoff.
Some of my ideas might work for your class so here they are:
Shadow Grab : 10e 1sec 20sec - for 1..30sec the next time someone shadow steps within earshot of you there destination is change to adjacent to you.
Life Grab : 5e 1sec 10sec - for 1..10sec the next time a foe in the area casts a healing spell you become the target and recieve the healing.
Not sure how youd work paradox into this but im sure youll find a way. Feel free to canabalize anything from my Slayer concept. I've recieve mostly negative feedback so not much point in my continuing with it.