When codirectors Scott Beck and Bryan Woods started thinking about who could play the antagonist in their new horror flick Heretic, they knew he had to have a few specific characteristics. The film is about a man who lures missionaries into his home, eventually turning a pleasant chat about religion into a nightmare scenario. So he had to be able to disarm with charm and humor, before switching gears to become intense and terrifying. “He had to have these moments of feeling dangerous, of…