Ive written a whole article on Quadrant Theory in Commander where I go deep on Cursed Mirrors objective strengths, but Ill summarize here once more
One Piece Release Calendar 2025-2026 All One Piece Card Game releases (2025-2026), grouped by month
2020-01-24 For spells with in their mana costs, use the value chosen for X to determine the spells converted mana cost
$0.49 Elrond, Master of Healing The Lord of the Rings: Tales of Middle-earth $5.49 Kogla, the Titan Ape Ikoria: Lair of Behemoths $1.49 Pippin, Guard of the Citadel The Lord of the Rings: Tales of Middle-earth $1.49 Incinerator of the Guilty Murders at Karlov Manor $3.99 Tom Bombadil The Lord of the Rings: Tales of Middle-earth $3.99 Disciple of Freyalise Modern Horizons 3 $0.99 Saruman of Many Colors The Lord of the Rings: Tales of Middle-earth $1.29 Shadow of the Enemy The Lord of the Rings: Tales of Middle-earth $0.49 Legolas, Master Archer The Lord of the Rings: Tales of Middle-earth $1.29 Primeval Herald Jumpstart 2022 $3.99 Glamdring The Lord of the Rings: Tales of Middle-earth $0.79 Merry, Esquire of Rohan The Lord of the Rings: Tales of Middle-earth 0 results found

Whenever it or another Ally enters, you can essentially scry the top four cards of your library, and put any Ally cards you find back on top while the rest go to the bottom (although, you can choose to put Ally cards on the bottom as well if you don't reveal)
Just like with Adaptive Automaton, its also a nice addition to the likes of Ayula, Queen Among Bears or Magda, Brazen Outlaw, where creature buffs are few and far between