pf2e.fyi
From Pathfinder Society Scenario #7-11: The Darkness Within, which isn't enabled.

Heart of Gloom

COMPLEX HAZARD 6
Stealth +16 (expert) to detect the fraying planes around it; noticing the Heart has a DC of 0
Description Within this mockery of a tree is a large, beating growth pushing grotesque branches through jagged planar fssures.

Disable DC 25 Arcana or DC 25 Occultism to close of a planar breach, DC 21 Athletics to snap one of the branches, or 4th-rank Planar Tether to seal of a breach. For each branch snapped or breach sealed, remove one action from the Heart's routine. Once the Heart reaches 0 actions in its routine, it is disabled.

AC 24; Fort +17, Ref +11
Hardness 14, HP 56 (BT 28); Immunities critical hits, precision

Crushing Horror
Trigger The Heart breaks its planar bonds

Effect Each creature in the area must attempt a DC 22 Will save. The Heart then rolls initiative.

Success The creature shrugs of the infuence of the Heart.

Failure The creature takes 3d8 mental damage and is Frightened 1.

Critical Failure The creature takes 6d8 mental damage and is Frightened 2. The creature can't reduce its frightened value below 1 for 1 minute.

Anguish (emotion, fear, mental)

The vine squeezes and overwhelms the creature with fear. The target takes 4d4 mental damage with a DC 24 basic Will save. On a critical failure, the creature is also Frightened 1 and can't reduce its frightened value below 1 for 1 minute.

Melee Thorny Vine +17 (magical, reach 20), Damage 2d8+9 slashing plus Anguish
Routine (3 actions) The Heart spends all of its actions making thorny vine Strikes against different creatures. The Heart doesn't take a multiple attack penalty.
Reset The trap deactivates and resets after 1 minute.
Pathfinder Society Scenario #7-11: The Darkness WithinORC