This spell conjures a well of entropic energy around the caster that saps the life of those trapped inside. The area generated does 3d10 damage to any creature that starts its turn within the area. Living creatures take Necrotic damage, as the entropic forces compel them to age without renewal. Constructs and undead take Force damage, as they are subjected to years of natural decay in the matter of seconds. Immaterial creatures and those who do not fall into either category above take Psychic damage as their essence endures the experience of years of idleness. If a creature is subject to multiple damage types, they take the type of damage they are least inured to but still only take 3d10 damage. Creatures can save with Constitution for half damage. The area is marked by wilted grass, damaged objects, and other signs of age, but in certain cases may be undetectable to mundane senses.
The well is a cylinder with a height of 20 feet and a radius of 30 feet. Even if the caster has an ability that should resist the effect, there is no escaping entropy.