From Pathfinder Society Scenario #5-20: The Rakshasa's Court, which isn't enabled.

Hidden Current

CREATURE 8

Often considered cousins of phades, veiled currents are loose veils of wind who catch prey within their folds.

Many elementals that roam the Plane of Air embody the mercurial formlessness and chaos of tumultuous storms.

Tempestuous Spirits

Air elementals are often flighty contrarians, often more concerned with bringing about change than with the specific changes they enact. Art and writing created by such elementals is exceptionally rare, as they usually destroy their projects once the challenge and excitement of completing them fades.

Invisible Courtiers

Formless and invisible elementals are the favored children of Hshurha, the air elementals' mother goddess. They receive favorable treatment in her realm, Verglas Precessional, where they serve as trusted advisors, emissaries to other planes, and members of her personal retinue, in addition to performing clandestine tasks the goddess wishes to keep hidden.

Perception +17; darkvision

Languages Sussuran

Skills Acrobatics +18, Athletics +18, Deception +15, Stealth +18

Str +2, Dex +6, Con +4, Int +2, Wis +1, Cha +3

AC 28; Fort +15, Ref +19, Will +13

HP 100; Immunities bleed, paralyzed, poison, sleep

Naturally Invisible

The veiled current is Invisible at all times. When they take a hostile action of any kind, the veiled current is Hidden instead of undetected as the vague outline of their humanoid form becomes faintly visible until the start of their next turn.

Speed fly 50 feet

Melee Static Fold +19 (agile, finesse, reach 10), Damage 2d10+8 bludgeoning plus Grab

Ranged Static Scream +19 (range increment 50 feet), Damage 2d8+4 sonic

Envelop

Requirements The veiled current begins their turn with a target of their size or smaller Grabbed

Effect The veiled current maintains the Grab and coalesces around the creature, stretching themself into a semisolid veil that smothers the creature within. This thereafter has the same effect as if the veiled current had Engulfed the creature (DC 26, 1d8+8 bludgeoning, Escape, Rupture 17). As engulfing a creature is a hostile action, the veiled current is Hidden instead of undetected every round it has a creature engulfed.

Grab

Requirements The monster's last action was a successful Strike that lists Grab in its damage entry, or the monster has a creature Grabbed or Restrained

Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with. This attempt neither applies nor counts toward the creature's multiple attack penalty.

The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.

Pathfinder Society Scenario #5-20: The Rakshasa's CourtOGL