Rune of Observation

You inscribe an invisible eye-shaped rune in the air, creating a sensor as . When created, this eye must be in your line of sight. Each time the spell's duration ends, you can spend 1 Focus Point as a free action to extend the duration for another hour, though as normal, it ends immediately during your next daily preparations.

Rank 4

Cast 1 action

Range 500 feet

Duration 1 hour