SFS Standard Danger Zone [one-action] Feat 8

Source Player Core pg. 171
Your quantum field merges with a more dangerous reality, becoming hazardous terrain that deals 1 damage to an enemy each time it enters a square in the area. You choose the damage type when you use Danger Zone, selecting from the following: acid, bludgeoning, cold, electricity, fire, piercing, slashing, or sonic. Increase the damage by 1 at 12th, 16th, and 20th levels. If you're legendary in Arcana or Occultism, you take only 1 minute to Predict Outcome.

Traits

Anchoring:You can use abilities with the anchoring trait only while your quantum field is activated. If you use the ability on your turn, in addition to their stated effects, they automatically Sustain your quantum field.
Zone:These actions apply an additional effect to your quantum field. You can apply the effects of a zone only to a quantum field that doesn't have a zone effect.