In response to a creature vocalizing, you make a sharp
sound and hold a finger up in an attempt to interrupt
them. The target must succeed on a Constitution
saving throw or become silenced as its mouth is fused
shut for the duration. If you silence a target that is
casting a spell with verbal components, the target’s
spell slot isn’t expended, but its action is wasted.

At the end of each of its turns, the target can make
a Strength saving throw as it tries to tear open its
mouth. On a success, the target takes 1d8 slashing
damage and is no longer silenced. Alternatively, as
an action, the target can use a bladed implement to
cut open its mouth, taking 1d8 slashing damage and
ending the silence.

At Higher Levels. When you cast this spell using a
spell slot of 4th level or higher, the damage increases
by 1d8 for each slot level above 3rd.