Breathtaking Wind 2014

1st-level evocation

Casting time: 1 action
Range: 30 feet
Components: V, S
Duration: Concentration, up to 1 minute
Save: Constitution

You target a creature with a blast of wintry air. That creature must make a successful Constitution saving throw or become unable to speak or cast spells with a vocal component for the duration of the spell.

Source: Deep Magic for 5th Edition (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details