Shadow Bloodline: Enveloping Darkness

[Kalyth]

I searched the forum and found this question being asked but not answered.

The 15th level Shadow Bloodline ability does not mention how often it can be used. It doesnt say per day or at will or anything.

"Enveloping Darkness (Sp): At 15th level, you may create an
area of deeper darkness that you can see through without
penalty. All creatures except you are entangled within
this darkness unless using freedom of movement or a
similar effect."

Has this ever been answered?

[Grick]

Kalyth wrote:

The 15th level Shadow Bloodline ability does not mention how often it can be used.

Errata to APG fixed it.

Enveloping Darkness (Sp): At 15th level, you may create an area of deeper darkness that you can see through without penalty. All creatures except you are entangled within this darkness unless using freedom of movement or a similar effect. You may use this ability once per day.