One of the classic tropes in fiction, or gaming, is that of a character having to face an exact copy of themselves. It could lead to a fight or a battle of wits of some sort, and the original needs to prevail. But how do you defeat someone who is your exact equal in all things?
In a game, of course, there are the vagaries of dice to randomise things, so that the result may be uncertain. And the copy may be played by the GM, so that can lead to differences in tactics that may be decisive. But it's still definitely not going to be an easy or certain thing.
It's essentially the one foe that your heroic PC can never be certain of defeating. Which makes it a unique and interesting challenge to try some time.
Commentary by memnarch (who has not seen the movie)
Aw, it's not actually an infinite weird reflection thing. Or maybe it is, and what we're seeing here is a weird combination of inside and outside the crystal? And if original Rey is in the crystal now, then who's outside it looking in as Rey?
I'm also wondering now if the whole surface is slightly shifting in color. I think the shadowy figures moving and clearing up to have the face-in-the-helmet crystal reveal would work much better when the it's all very slightly glowing and changing. That could just be my imagination running wild though; sometimes what one pictures doesn't turn out to be clear enough when it's finally made, as important details get lost in the everything else.
For the comic story? I really want to see how the GM is going to twist things around Pete such that Pete goes crazy trying to defeat himself. Assuming, of course, that it's more of a long-term thing and not foreshadowing something silly like Rey stepping through the crystal surface to have a chat with herself.
Transcript
Rey: I walk forward. Towards infinity.
GM: You take one step and find yourself at the crystal surface.
GM: Shadowy figures shift beyond.
Kylo Ren: Ooh! It’s like the Mirror of Erised! Ask it to show your parents!
Rey: I don’t want to see spotty young Luke.
Kylo Ren: Ask to see Mara Jade!
Rey: No. I’ve got a better idea.
Rey: The enemy has only images and illusions behind which he hides his true motives. Destroy the image and you will break the enemy.
Rey: Show me who stands between me and ultimate power.
GM: The shadows merge into one and reach out to your outstretched hand.
GM: The image clears and you see... yourself.
Rey: Finally! A worthy opponent!