Warden Eyes

You cast the spell at any solid flat surface of at least 2 feet radius (the ground, a wall, a tree trunk ...). Many eyes, with the same characteristics as yours, appear on the surface. As an action, you can see through this eyes but you go deaf and blind with regard to your own senses. You also can dispel the eyes at any given time.

If a creature gets at least 30 feet close to the eyes it must make a Perception DC to see them. If it successes it knows its being watched.

The eyes disappear if Dispel Magic is casted or if the surface where the eyes are set its destroyed.

 At a 3rd level spell the duration last for 8 hours, at the 5th level it lasts for 12 hours and at the 7th level it lasts for 24 hours.