As a spell-writer, you're the magical equivalent of computer programmer. You've made and copied countless spells, but this is the first time you're desperate enough to try 'hacking' one.
The target is your hated rival, and you've discovered that their signature spell, 'Silence', can be manipulated. Normally, this spell shuts down the target's voice for a short time, but if it's altered just the tiniest bit, it can instead erase all memories linked to a specific keyword. With a large quantity of specific knowledge you've been gathering, you're close to having enough data to successfully alter the spell. Unfortunately, the
This is extremely dangerous, but in the heat of a duel, you've got to try something.

You must target a specific spell of your opponents (no spells can be targetless), and you must have a reasonable chance of stopping it. To do this, you need to examine the original spell's text thoroughly.

When writing down a spell, you must choose exactly how many components it needs, what kind of components they are, and what the exact wording