Small variations beyond normal card measurement tolerance can immediately reveal counterfeits
Stack them so it puts all the permanents into play first to get their ETB triggers, and then exiles them again, to produce more tokens and set you up to do it again the next turn
At ~1 per 120 boxes, its a true grail pull

Advanced Search Sets Random Syntax Absolute Grace Akroma's Memorial Akroma, Angel of Wrath Akroma, Angel of Wrath Avatar Animar, Soul of Elements Anurid Scavenger Apostle of Purifying Light Auriok Champion Black Ward Blood Baron of Vizkopa Cemetery Gate Cephalid Snitch Chameleon Colossus Cho-Arrim Legate Council Guardian Crown of Awe Crusading Knight Darkwatch Elves Death Speakers Devout Lightcaster Disciple of Grace Dominaria's Judgment Duskrider Falcon Duskrider Peregrine Great Sable Stag Hand of Honor Hungry Lynx Hunted Horror Karmic Guide Knight of Glory Knight of the Kitchen Sink Llanowar Knight Lord of the Nazgl Mask of Law and Grace Melesse Spirit Minion of Leshrac Mirran Crusader Mystic Crusader Mystic Enforcer Mystic Familiar Nantuko Blightcutter Nightwind Glider Obsidian Acolyte Order of Leitbur Order of the White Shield Oversoul of Dusk Paladin en-Vec Phantom Centaur Pilgrim of Virtue Questing Phelddagrif Riftmarked Knight Righteous War Sanctifier en-Vec Scalebane's Elite Soltari Monk Spectra Ward Spirit of the Night Stillmoon Cavalier Strength of Isolation Sword of Feast and Famine Sword of Light and Shadow Sword of Once and Future Sword of Sinew and Steel Sword of Sinew and Steel Teroh's Vanguard Teysa, Envoy of Ghosts Ureni, the Song Unending Valeron Outlander Voice of Grace Wall of Light Whirling Dervish White Knight

2: Gain control of target creature until end of turn
Other than that, Mewtwo EX remains one of the most consistent decks in the game