Life's Flowing River

You create a flowing river of ghostly water and that sheds dim light for 10 feet on each side. The river begins in an adjacent square to you and extends in a straight 5-foot path to its maximum range or until it hits a solid barrier, whichever comes first. A creature that begins its turn in the glowing waters of the river or who enters one of the river's spaces must attempt a Will save. If the creature is undead or a nindoru, it takes @Damage[4d6[mental]] damage, modified by the result of their Will save.

Critical Success The creature ignores the river's effects until the start of its next turn. If the creature is undead or a nindoru, it takes no damage.

Success The creature treats all squares occupied by the river as difficult terrain until the start of its next turn. If the creature is undead or a nindoru, it takes half damage.

Failure As success, but the creature is also knocked Prone. If the creature is undead or a nindoru, it takes full damage.

Critical Failure As failure, but the creature is pushed 20 feet along the river's path in the direction of flow. If the creature is undead or a nindoru, it takes double mental damage.

Heightened (+1) The mental damage increases by 1d6.