How can I, using existing spells in D&D 5e, create a Surveillance System?
This Surveillance System should do the following:
Be able to see what happens in different locations at the same time.
Be able to show what's being seen in something like a screen.
Resources available are:
Some preparation (like invoking some kind of creatures or placing spells or magical items in some locations).
Virtually unlimited money/spellcaster time.
- minimizing cost to surveil a location 24/7.
Any of these costs should be explained (e.g.: one L3 wizard per location surveilled.)
I'd like to keep it within existing spells, not needing to create some new spells, though it doesn't need to be strictly RAW.
I will explain here the context for which I'll use this Surveillance System, though it should be used for other contexts that require the same criterion.
There should be a huge resort where the richest nobleman go to satisfy their most cruel desires. There, dungeons and arenas are set where kidnapped adventurers find their fate, which usualy is a cruel death. But this kind of amenity sometimes requires the gladiators/adventurers/players to be inside a dungeon, and there's where our Surveillance System is needed.