Une paire en miroir ou paire miroir est une paire de cartes, le plus souvent de couleurs ennemies, qui comportent des capacités qui sont inversées (i.e. opposées, contraires) dans l'autre carte de la paire miroir.

La R&D de Wizards of the Coast appelle les cartes miroir des "reflets". De nos jours, elles paraissent à un rythme beaucoup plus faible qu'aux débuts de Magic. Voir les liens suivants pour la définition de la R&D :
• Stating the Obvious (Jun 16, 2008 - Reflections – "[...] just two cards and the two cards are opposite in nature. [...] In a more traditional set, you might see a reflection done as an enemy-color card with a similar structure yet mostly opposite effect (e.g. protection from white vs. protection from black)")
• A Nightmare To Remember (Jan 7, 2002 - The Black Reflections - "[...]You see, Richard is a big fan of "mirrored" spells – that is, two spells that are reflections of one another. (Examples from Alpha – [...] – are White Knight /Black Knight , Blue Elemental Blast /Red Elemental Blast , Deathgrip /Lifeforce , etc.)")
• Inquiring Minds Want to Know, Part 2 (Mar 24, 2003 - Q(Boyd C.) : "[...] Magic has pitted many of its colors against one another by establishing cards that have equal but opposite effects [...] Will this flavor [...] resurface at any point?" & A(Mark) : "We still do cards with that kind of flavor, but not in as great a number. I know that Richard, for one, is a big fan of reflections. I do believe that we are at a low ebb right now, and as I love to say, I believe the pendulum will eventually swing the other way.")
• Danger, Will Robinson (Mar 17, 2003 - Mind Twist - "[...] mass discard is just a reflection of mass card drawing.")