As your devotion grows, so does your vision. Let your vision guide those who have gained your confidence....or even your ire. 

As an action you may place a runic symbol upon a willing creature. If the creature is unwilling they must make a Wisdom Saving Throw against your spell save. The symbol appears as either a tattoo or scar upon the skin. The recipient decides which form it takes. The symbol can removed by physically removing that part of the skin or by casting the Dispel Magic at a level equal to when the symbol was placed. 

Alternatively, when cast you can see a creature marked by the rune and a small area around them. Using this action is similar to Find Familiar where they are blinded and see the location of the target. Targets are unaware they are being watched unless they have abilities similar to See Invisibility.