High knockback can be useful for enemies who have an uninterruptible attack. Using Heavy Blow against this kind of enemy will usually push them back far enough to prevent their attack from hitting the Knight, allowing for more consecutive attacks, a chance to escape and heal, and safer Nail attacks for enemies with high range (thus removing the need for a ranged Spell and saving SOUL).
Enemies that do not take knockback will not be affected by Heavy Blow's increased knockback. This includes most Bosses.
How to Acquire
Effective when combined with Quick Slash to knock back enemies at a faster rate.
Allows the Knight to push all enemies away with strikes while not slowing down. More effective combined with Quick Slash.