From Pathfinder #157: Devil at the Dreaming Palace, which isn't enabled.

Summoning Rune (Barbazu Devil)

COMPLEX HAZARD 5

Stealth +11 (trained)

Description A summoning circle inlaid into the room's floor detects living creatures and summons a violent devil.

Disable DC 18 Perception to notice the trap's magic and avoid stepping on the floor outside the circle, followed by DC 21 Thievery (trained) to break the circle or Dispel Magic (3rd rank; counteract DC 23) to counteract the rune

AC 10

Summon Devil (arcane, summon)

Trigger A living creature steps on any part of the floor not enclosed by the summoning circle

Effect One round after a creature touches the triggering area, the door to the room slams shut and locks (two Thievery checks to pick) and a Barbazu devil appears in the summoning circle.

The devil rolls initiative and remains for 3d6 rounds, after which the spell ends and the devil disappears. The devil also disappears if someone disables the trap before the duration expires.

The summoned devil can use 3 actions each round and can use reactions, unlike most summoned creatures.

Reset The trap resets each day at dawn.

Pathfinder #157: Devil at the Dreaming PalaceOGL