(8/25/2017) If an activated ability of a card in exile with a cage counter on it references the card it's printed on by name, treat Mairsil's instance of that ability as though it referenced Mairsil by name instead
For every secret rare Pokmon card in a set, there is usually a card of a lower rarity that is identical in name and gameplay mechanics

Abbot of Keral Keep Act on Impulse Alania's Pathmaker Anep, Vizier of Hazoret Archaic's Agony Ardent Dustspeaker Asgardian Inspiration Atsushi, the Blazing Sky Blazing Crescendo Bonehoard Dracosaur Brazen Cannonade Breeches, Eager Pillager Breya's Apprentice Burning Curiosity Cait Sith, Fortune Teller Capricious Sliver Case of the Burning Masks Caves of Chaos Adventurer Chandra, Fire Artisan Chandra, Flameshaper Chandra, Heart of Fire Chandra, Legacy of Fire Chandra, Pyromaster Chaos Channeler Charred Foyer // Warped Space Chase Stein, Runaway Cleon, Merry Champion Clockwork Percussionist Commune with Lava Count on Luck Crimson Caravaneer Crimson Operative Crossover Collaboration Daredevil, Fearless Fighter Dark-Dweller Oracle Diversion Specialist Duchess, Wayward Tavernkeep Ecstatic Beauty Electrostatic Blast Emberheart Challenger Embodiment of Flame Embrace the Unknown End-Blaze Epiphany Endrider Spikespitter Equilibrium Adept Evendo Brushrazer Experimental Synthesizer Fateful Tempest Feldon, Ronom Excavator Fire Giant's Fury Fire-Brained Scheme Fires of Mount Doom Flameskull Galvanic Relay Geistflame Reservoir Gila Courser Glimpse the Impossible Goblin Researcher Grotag Night-Runner Harnesser of Storms Harnfel, Horn of Bounty Haste Magic Headliner Scarlett Hedron Detonator Heroes for Hire Heroes' Hangout Ignite the Future Impossible Inferno Inspired Tinkering Inti, Seneschal of the Sun Irascible Wolverine

So it may be worth hunting through old decks to see if it's still hanging around
There are hundreds of social media accounts and channels dedicated to the practice, and we think that's great
You must inspect the top, bottom, left, and right borders on both front and back of the card to determine how centered it is or is not