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From Pathfinder Dark Archive (Remastered), which isn't enabled.

Darkside Mirror

COMPLEX HAZARD 14
Stealth +24 (master) to notice it isn't a regular mirror
Description A magic mirror replaces characters with malicious mirror duplicates from another dimension.

Disable DC 34 Thievery (legendary) to retrieve a creature from the other dimension within 10 minutes of the switch (possible only if their mirror duplicate is dead), DC 39 Thievery (master) to permanently disable the mirror once all mirror duplicates are dead, or Dispel Magic (7th rank; counteract DC 32) to counteract the mirror for 1 minute and prevent additional replacements during that time.

AC 34; Fort +25, Ref +20
Hardness 1, HP 4 (BT 2) The mirror can't be damaged while any mirror duplicate is alive

Reflection of Malice (arcane, teleportation)
Trigger A creature is reflected in the mirror

Effect The mirror absorbs the creature, replacing it with a malicious mirror duplicate (DC 34 Reflex to avoid being absorbed into the mirror), and rolls initiative.
Routine (1 action) The mirror absorbs another reflected creature and replaces it with a mirror duplicate. A mirror duplicate attacks on their own initiative, using the same statistics as the original creature, but they hate all other non-duplicate creatures. A mirror duplicate can spend 3 actions in contact with the mirror to return to their original dimension and release the duplicated creature.
Reset The mirror is always ready to absorb creatures into the other dimension. Ten minutes after a creature is sucked into the mirror, if an ally doesn't rescue the creature, it reaches the other dimension. In the mirror dimension, it counts as a mirror duplicate. These dimensions are alternate realities, not planes, so even spells like Interplanar Teleport can't reach them.
Pathfinder Dark Archive (Remastered)ORC