Area A cylinder, 2 yards tall with a 5-yard radius, centered on a point within medium range

Duration 1 minute; see the effect

Purple fog spreads through and heavily obscures the area for the duration or until dispersed by wind. The fog is heavier than air, so it settles into cracks and openings in the ground below it. At the end of each round for the duration, roll a d6. If the number is even, the cloud moves half that many yards away from you.

When the fog appears and at the end of each round for the duration, each creature in the area must get a success on a Strength challenge roll or take 1d6 damage and become poisoned for 1 round. While poisoned in this way, the creature is also immobilized.