One note here: be aware of the differences in play / draw
You need your commander on the board for this, but that's usually a small ask
We have three types of perfect fit sleeves for standard sized TCGs like Pokemon that you can use to double sleeve your cards
You could have just had more than one in your deck, or you could splash some blue mana to cast Vesuvan Doppelganger
For instance, heres an example of Mox Opal in Vintage alongside Paradoxical Outcome: Creatures (2) Lands (12) Spells (46) 2 Sensei's Divining Top 1 Tendrils of Agony 1 Brainstorm 1 Yawgmoth's Will 4 Force of Will 1 Mana Vault 1 Sol Ring 1 Demonic Tutor 2 Hurkyl's Recall 1 Time Walk 1 Ancestral Recall 1 Mana Crypt 1 Timetwister 1 Mind's Desire 1 Merchant Scroll 2 Night's Whisper 1 Black Lotus 1 Lotus Petal 1 Mox Emerald 1 Mox Jet 1 Mox Pearl 1 Mox Ruby 1 Mox Sapphire 2 Repeal 1 Ponder 3 Preordain 4 Mox Opal 1 Gitaxian Probe 1 Flusterstorm 1 Dig Through Time 4 Paradoxical Outcome Mox Opal has also found a few other homes from time to time, always a part of something really abusive, such as the Lantern of Insight decks we discussed yesterday
Im definitely going to be slotting this in my Glissa, the Traitor and Osgir, the Reconstructor decks at the very least