Squelch

R: [dice]x10 ft; T: spell; D: 0

You can cast this spell in response to another spell being cast. You halve the duration, effects, or damage of a spell that would affect you or anything within range. You cannot affect the spell’s range or area. If the spell requires a Save, you may instead grant the targets a Boon.

The [sum] of this spell must be equal to or greater than the [dice]x2 of the spell you’re attempting to squelch.