> Keep heading toward the top of its head, though not nearly far enough that we'd be hit by a swinging horn. Byakuren only has to hold out for a few more seconds...
> While moving toward the top of its head, flip our grip on the sword so we're holding it in stabbing mode rather than swinging/swordfighting mode.
> Once we get over the top of its head properly, stab down into the top of its head with the sword.