In this day and age of 2++ reroll. I am thinking 40k needs the ability use Warp Charges to dispel enemy Blessings. I don't know how would be best to implement it. I think this could curtail the worst of the screamer stars and seer jet bike councils. It would also give a way to remove Biomancy off of Tyranid Monstrous Creatures. (Baring what the new codex brings)