pf2e.fyi
From Pathfinder #177: Burning Tundra, which isn't enabled.

Spectral Archers

COMPLEX HAZARD 8
Stealth +28 (expert)
Description Ghostly soldiers wielding crossbows manifest within the towers that flank the gatehouse and rain bolts down upon intruders.

Disable DC 31 Intimidation (expert) to cow the archers into fleeing or DC 28 Religion (expert) to temporarily banish the spirits

AC 10

Rain of Bolts
Trigger A creature attacks the graveknights in area G1 or enters the castle

Effect The haunt makes a spectral bolt Strike against the triggering creature, then rolls initiative.
Routine

(1 action) The hazard fires one bolt at every creature in a 30-foot-by-30-foot area in front of the gate as 1 action. Because the spectral archers fire bolts continuously, the haunt can also use the Continuous Barrage free action (below) to fire bolts at each creature during that creature's turn.

Continuous Barrage
Trigger A creature in front of the gate finishes an action

Effect The haunt makes a spectral bolt Strike against the triggering creature.
Melee Spectral Bolt +20, Damage 2d10+11 void

No multiple attack penalty

Reset The haunt vanishes permanently if the graveknights are destroyed. Otherwise, it returns after 1 hour.
Pathfinder #177: Burning TundraOGL