This is also a play of ‘Breaking the Thrust’ which you saw drawn before me two plays back, which is when I beat the sword to the ground, I immediately and boldly put my right foot onto his sword. And then I wound him severely in the head, as you can see.
The lead in to this play is exactly the same as the 11th scholar. Meet your opponents attack in posta frontale as shown by the 2nd master. As you follow through with your right foot, continue the movement of your sword down to posta dente di zenghiaro, beating your opponents sword to the ground.
At the same time, step through with your right foot. Bend your supporting leg so as to maintain your height and avoid bobbing up and down. Lift your right foot high and use the sole of your foot to push against the flat of the blade, then put your weight down. This is a deliberate placement, not a stomp. This will damage the blade and potentially lever it out of your opponents hands.
There are two possible ways to proceed from this point.
If you have landed with a straight drop and are pointing more or less directly at your opponent, the first method is to make a double cut. This is essentially identical to the 11th scholar, but with different targeting. It also works if you go to make the play of the 11th scholar, but in all the excitement, your first cut goes too high. You can still recover as the 12th.
Keeping your elbows in, drop your left hip forward, flicking your sword up past your opponents right shoulder. Without pause, flick your hips back the other way. Use this movement to deliver a downward cut to the top of the head as shown. This is a fast double motion driven purely by the hips. The more your drop your hip, the better it will work.
Alternatively, if you land after the disarm with your own momentum still turning off to the left, continue the movement of the blade around, until you are in posta coda longa. Keep your elbows tied gently but firmly to your core, and use them as a pivot point for the strike. Throw the blade over your head in an arc to strike your opponent as shown. Each of these options is as effective as the other, but you need to know why you would choose one over the other. The choice is determined by the details of your balance point after the foot disarm.