From Pathfinder #162: Ruins of the Radiant Siege, which isn't enabled.

Greater Planar Rift

HAZARD 21

MAGICAL TRAP

Stealth +31 (legendary)

Description A ragged planar rift drags things into its depths and hurls creatures through from its terminal end.

Disable Dispel Magic (9th rank; counteract DC 46) to seal the rift

HP 10 (BT 5)

Greater Planar Rift (arcane, teleportation)

Trigger A creature moves within 5 feet of the rift

Effect The creature must succeed at a DC 44 Will save or be drawn into the rift. A creature so drawn in becomes Stunned 3 and immediately teleports to a different random area in Kharnas's ruins.

Pathfinder #162: Ruins of the Radiant SiegeOGL