You create a shroud of magical darkness that feeds on those inside it. This globe of pure darkness is identical to that created by a 4th-rank Darkness spell. Blunt, gnashing teeth made of shadows gnaw at the creatures within. Make a spell attack roll against the Fortitude DC of each creature in the area. Any creature that fails takes 4d6 bludgeoning damage as teeth attach to it. While the teeth are attached, it takes a –10-foot circumstance penalty to its Speeds and can't Step. Whenever a creature ends its turn in the area, the teeth attempt to attach to that creature if they haven't already, and they deal 1d6 bludgeoning damage to any creature they're already attached to. The shadowy teeth become unattached from any creature that leaves the area but can't otherwise be detached from a creature while that creature remains in the area. You can Dismiss the spell.
Traits
An ability with this trait involves an attack. For each attack you make beyond the first on your turn, you take a multiple attack penalty.
An action with this trait requires a degree of mental concentration and discipline.
Darkness effects extinguish non-magical light in the area, and can counteract less powerful magical light. You must usually target light magic with your darkness magic directly to counteract the light, but some darkness spells automatically attempt to counteract light.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.