Adavarn's Horrid Visions

You conjure a horrible creature only dreamt in nightmares out to 30ft from you. This monster is an illusion that fills up to a 10-foot cube, you can use a bonus action to move it 30ft and make sounds, but objects and creatures pass through it. 

The creature emits a 10-foot emanation of fear, each time a creature enters the 10-foot emanation or starts its turn in it, the creature must make an Intelligence saving throw or become frightened of the illusion, and takes psychic damage equal to 2d8 per turn its failed the save. On a success, the illusion stays but the creature is immune to the illusions emanation and understands its an illusion. A creature that makes an attack roll against it must make an Intelligence save to determine weather its an illusion. On a success they are immune to the spells affect.

At higher Levels. The spell deals an extra 1d8 damage per 2 spell levels higher than 3rd.