Choking Miasma

Create a 30-ft. radius cloud of your breath type. The area is lightly obscured. Hostile creatures that start their turn there must make a CON save, taking 5d8 damage and becoming unable to speak until the start of their next turn on a failed save.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.