@Renegade_Punk
Exactly what I use it for too :D (as in I also have a Vish Kal EDH deck).

I have a few favourites for it though (all in the Vish Kal deck):
Preacher - the enemy sacrifices a creature too!
Yosei - pretty much infinite timewalks. Pretty broken (and mean).
Solemn Simulacrum - so much card advantage.