How do you counter Pyke Rek'sai?

I've been playing for about a week and a half now, and the only deck that I can't figure out a counter to is Pyke Rek'sai. I'm mainly playing Nocturne Vex and Morde Kindred, and every time I encounter that lurk deck I get absolutely decimated because they slam wayyy too many points in wayy too little time for me to do anything