Wastrel's Collapse

You attempt to interrupt a creature's movement by tricking their reflexes with a harmful illusion. If a creature has moved at least 5 feet, then they must make a Dexterity Saving throw. On a failed save, the creature falls prone taking 3d8 psychic damage from the dangerous image. The creature automatically succeeds their saving throw if they are immune to prone.

 A creature is unaffected by this spell if it can't see, if it relies on senses other than sight, such as blindsight, or if it can perceive illusions as false, as with truesight.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you add 1d8 for each slot level above 1st.