Scrying

V, S, M (focus worth 1,000 gp); 10 Minutes
You can see and hear a particular creature on the
same plane of existence as you. On a failed
Wisdom saving throw (with modifiers!), the spell
creates an invisible sensor within 10 feet of the
target. You can see and hear through the sensor
as if you were there. The sensor moves with
the target, remaining within 10 feet of it for the
duration.