Okay. So my group wrapped up the Legacy of Fire campaign last year, and they still love the world and their PC's so we're rolling with it.
The PC's REALLY got owned by the red dragon Aberzjerax as he took the Impossible Eye from them so they absolutely want revenge. And I've decided that a very patient, divine heavy read dragon could be a fairly powerful enemy (Our campaign is actually slid into Monte Cook's Ptolus game world, so there's a lot of crossover with other games we run -it's all a shared world is our gimmick). In this world, the dragon was never a pawn of the Brass Sultan, but his own faction.)
I'm looking for mirror heavy and red dragon based adventures and encounters I can mine. I'm already looking at Mask of Diamond Tears from old dungeon adventures, and I'm trying to figure out some fun things. I sort of want to send the PC's on quests for mirror related magic macguffins (there's an old secret dead mage kingdom based entirely on the mirror universe) that will help them deflect the red dragon's considerable scrying or possibly mirror walking into his lair.
Final encounter I'm tentatively thinking of having them curb stomp the old stat block of Aberzjerax (as the PC's will be level 19 or so by then) and suddenly more versions of Aberzjerax pop out of the mirrors they brought... possibly all of them combining into some weird multidimensional amalgamation that I'll use the Choral the Destroyer stat block from the last Kingmaker book.
Thoughts?
Hmm. The end scene of Red Hand of Doom is good, or much of Dragon Mountain.
Old flash comics are good for mirror ideas.
Mirrors make me think of medusas, and half-red dragon medusas would be great. Wait for everyone to look away, then breathe fire.
Spell turning is a king of reflection, and could go very wrong for players if they don't expect it.
There's a mirror-looking fey from 3.5, I don't remember the details, because I was a player in this game, but it had unbeatable SR, just brutal. A later monster manual, 3 or 4?
3.5 epic level handbook has force dragons, those could be 'mirrorlike', I suppose...
3.5 also had the nerra, natives of the plane of mirrors. They were in the Fiend Folio, I believe.