Blowgun Master

You have trained your breathing extensively to better your abilities with a blowgun. You gain the following benefits:

• You can hold your breath three times longer than normal.
• You add your Constitution modifier to attack and damage rolls made with a blowgun.
• Your blowgun attacks score critical hits on a roll of a 19 or 20.
• The DC for your coated or special darts equals 8 + your Constitution modifier + your proficiency bonus if it isn’t already higher.

Combine this feat with a new fighting style option, Blowgun Expert.

Blowgun Expert
You gain proficiency with blowguns if you don't already have it.

While wielding a blowgun, you ignore the loading property of blowguns and attacking at long range doesn't impose disadvantage on your blowgun attack rolls. When you are hidden from a creature and miss it with a blowgun attack, making the attack doesn't reveal your position.