Programmed Illusion

Programmed Illusion
6th-Level Illusion

Casting Time: 1 action
Range: 120 feet
Components: V, S, M (a bit of fleece and jade dust worth at least 25 gp)
Duration: Until dispelled

You create the image of an object, a creature, or some other visible phenomenon within range that activates when a specific condition occurs. The image is silent when created, but it can later make sound if you wish. It must be no larger than a 20-foot cube, and you decide when you cast the spell how the illusion behaves and what sounds it makes. This scripted performance can last up to 5 minutes.

When the condition you specify occurs, the illusion springs into existence and performs in the manner you described. Once the illusion finishes its performance, it disappears and remains dormant for 10 minutes. After that time, the illusion can be triggered again.

The triggering condition can be as general or as detailed as you like, but it must be based on a visual or audible event that occurs within 30 feet of the spell's area.

Physical interaction with the image reveals it to be an illusion, because things can pass through it. A creature that uses its action to examine the image can determine that it is illusory with a successful Intelligence (Investigation) check against your spell save DC. If a creature discerns the illusion for what it is, the creature can see through the image, and any sound or smell it produces becomes faint and unnatural to that creature.