Knockback is a removed talent that allowed a creature to push back the unit it attacked by 1 tile. If the attacked unit were to collide with the unit behind it, it swaped places.
History[]
Knockback was introduced in version 0.70 alpha as Royal Vanguard's talent. However, it has been removed from this scroll in version 0.72 alpha and no other creature has this talent, so this talent is currently unavailable.