Area A cube of space, 5 yards on a side, originating from a point within long range

Duration Concentration, up to 1 minute

Tendrils of darkness tumble through the area, causing it to become totally obscured for the duration. The darkness blocks all nonmagical vision. When you use an action to concentrate on this spell, you can move the area up to 5 yards.

When you cast the spell, and again when you use an action to concentrate on it, the tendrils curl around creatures inside the area, drawing vitality from them. Each creature in the area must make a Strength challenge roll with 1 bane. When a creature gets a failure on this roll, it takes a –10 penalty to its Health, which worsens by 10 with each subsequent failure. The penalty lasts until the spell ends. When a creature has a penalty to its Health from this spell, it is impaired and slowed. For each creature that has a penalty from this spell, you have a +3 bonus to your Health score. The bonus gained from this effect lasts for 1 hour.