As an action, you create a sound or an image of an object within 5 meters that lasts for the duration. The illusion also ends if you dismiss it on your turn (no action required) or cast this spell again.
If you create a sound, its volume can range from a whisper to a scream. It can be your voice, someone else’s voice, a lion’s roar, a beating of drums, or any other sound you choose. The sound continues unabated throughout the duration, or you can make discrete sounds at different times before the spell ends.
If you create an image of an object—such as a chair, muddy footprints, or a small chest—it must be no larger than a 1-meter cube. The image can’t create sound, light, smell, or any other sensory effect. Physical interaction with the image reveals it to be an illusion, because things can pass through it.
A creature can use an action to examine the sound or image, making an ability check using Insight (Intelligence) against your spell save Difficulty. If it succeeds, it becomes aware that it is an illusion. If a creature discerns the illusion for what it is, the illusion becomes faint to the creature.
The illusion can be created to appear as a threatening creature just out of sight of a creature within 10 meters that you can see. If you so, the spell ends and the creature must make a Will saving throw.
On a failure, it takes 1d2 psychic damage, can’t take reactions until the end of its next turn, and the next attack roll against it has advantage if it is made before the end of your next turn.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
At higher levels
This spell’s damage increases by 1d2 when you reach 9th level (2d2) and 17th level (3d2).