Dance of DarknessFocus 5
Source Pathfinder Advanced Player's Guide
Cast

Duration Varies
You dance, Striding up to half your Speed. At either the start or end of your Stride, you create an area of magical darkness in a 10-foot burst centered on your location. This area is filled with magical darkness that works the same way as that created by a Darkness spell of the same rank. When you create the darkness, attempt a Performance check to dance, with a standard DC for your level, to determine the duration of the darkness.
Critical Success 1 minute
Success 2 rounds
Failure 1 round
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
DarknessDarkness 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.
FocusFocus spells are a special type of spell attained directly from a branch of study, from a deity, or from another specific source. You can learn focus spells only through special class features or feats, rather than choosing them from a spell list. Furthermore, you cast focus spells using a special pool of Focus Points—you can't prepare a focus spell in a spell slot or use your spell slots to cast focus spells; similarly, you can't spend your Focus Points to cast spells that aren't focus spells.
ManipulateYou 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.