Any creature the player controls that couldnt be targeted by the original spell (due to shroud, protection abilities, targeting restrictions, or any other reason) is just ignored by Mirrorwing Dragons ability
Synthoids Abandoned Sarcophagus Abzan Banner Abzan Monument Academy Manufactor Accessories to Murder Accomplished Automaton Accorder's Shield Ace's Baseball Bat Acidic Dagger Acorn Catapult Acquisition Octopus Adaptive Automaton Adaptive Gemguard Adaptive Omnitool Adaptive Training Post Adarkar Sentinel Adrestia Adventurer's Airship Adventuring Gear Aegis Automaton Aegis of the Legion Aegis of the Meek Aeolipile Aeon Engine Aerial Doombot Aerial Surveyor Aerial Toastmaster Aeronaut's Wings Aesthir Glider Aether Refinery Aether Spellbomb Aether Syphon Aether Vial Aetherflux Conduit Aetherflux Reservoir Aetheric Amplifier Aetherjacket Aethersphere Harvester Aetherwing, Golden-Scale Flagship Aetherworks Marvel Aettir and Priwen Agatha's Soul Cauldron Agent of Acquisitions Agent's Toolkit Agility Bobblehead Air Response Unit Akroan Horse Akroma's Memorial Al-abara's Carpet Alacrian Armory Aladdin's Lamp Aladdin's Ring Alchemax Slayer-Bots Alchemist's Vial Alchor's Tomb Alhammarret's Archive Alibou, Ancient Witness Alibou, Ancient Witness Aligned Hedron Network All-Fates Scroll Alloy Golem Alloy Myr Alpha Myr Altar Golem Altar of Bhaal Altar of Dementia Altar of Shadows Altar of the Brood Altar of the Goyf
The 53-card list is built from Scryfall's is:gamechanger query, which mirrors the official WotC Game Changers list
4) Any amount of Pokmon can be in your card, as long as it's not above six
So powerful, in fact, that the card retains a high price tag despite multiple reprints and limited format legality
Its already down to the $8 range and $5 is in play
