Dimensional Darkside Mirror

What looks like an ordinary mirror is a doorway to a darkside reality. Catch your reflection in it and a wicked twin steps out to take your place while you vanish into the glass.

The mirror can't be damaged while any mirror duplicate is alive.

Reflection of Evil [Reaction] (arcane, conjuration, teleportation)

Level 19 · Complexity Complex

Stealth +37 (master) to notice it isn't a regular mirror

Disable

• Thievery DC 40 (legendary) — (legendary) to retrieve a creature from the other dimension within 10 minutes of the switch (possible only if their mirror duplicate is dead), Thievery
• DC 45 (master) — (master) to permanently disable the mirror once all mirror duplicates are dead, or dispel magic (8th level; counteract
• DC 37

AC 34

HP 4 · Hardness 1

Trigger A non-evil creature is reflected in the mirror

Effect The mirror absorbs the creature into the mirror, replacing it with an evil mirror duplicate (DC 41 Reflex to avoid being absorbed into the mirror), and rolls initiative.

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 with Thievery, it reaches the other dimension, where it might be captured or killed. In the mirror dimension, it counts as a mirror duplicate, so the denizens of the other dimension can't destroy the mirror on their side while the absorbed creature is there. These dimensions are alternate realities, not planes, so even rituals like plane shift can't reach them.