The fucking parry, son. On anything. Every move I've seen so far, anyway. And that includes some moves against bosses that do not look possible.
It is that. but you can mix it with the heavy for some pretty nice alternatives. There's also really fluid cancelling and that guard break which becomes more important as it goes and the difficulty ramps up.
Because what Woolie fumbled with, it looked like a very basic three-hit combo.