Pit Illusion Snare

You add a touch of illusion magic to a magical sensor that makes the target believe a bottomless pit opens below it when the snare is triggered. A Medium or smaller creature that enters the snare's square must attempt a DC 20 will save.

Critical Success The creature is unaffected.

Success The creature is cautious moving forward, treating the snare's square and all adjacent squares as difficult terrain until the end of its turn.

Failure The creature falls Prone.

Critical Failure The creature falls prone and takes 1d4 mental damage.