If the face-down creature was an instant or sorcery card, it cant return to the battlefield and simply stays exiled
Commander| Jason Alt Commander (2) 1 Ludevic, Necro-Alchemist 1 Vial Smasher the Fierce Creatures (18) 1 Archaeomancer 1 Chasm Skulker 1 Fog Bank 1 Guttersnipe 1 Jeleva, Nephalia's Scourge 1 Jori En, Ruin Diver 1 Kaervek the Merciless 1 Melek, Izzet Paragon 1 Niv-Mizzet, the Firemind 1 Mulldrifter 1 Notion Thief 1 Psychosis Crawler 1 Shriekmaw 1 Snapcaster Mage 1 Spitebellows 1 Taurean Mauler 1 Tidespout Tyrant 1 Torrential Gearhulk Planeswalkers (1) 1 Nicol Bolas, Planeswalker Instants (7) 1 Curtains' Call 1 Dig Through Time 1 Evacuation 1 Mindswipe 1 Murderous Cut 1 Rewind 1 Searing Wind Sorceries (11) 1 Black Sun's Zenith 1 Blasphemous Act 1 Call the Skybreaker 1 Cruel Ultimatum 1 Decree of Pain 1 Mizzix's Mastery 1 Spelltwine 1 Subterranean Tremors 1 Temporal Tresspass 1 Treasure Cruise 1 Volcanic Vision Enchantments (8) 1 Curse of Echoes 1 Eye of the Storm 1 Future Sight 1 Gratuitous Violence 1 Meishin, the Mind Cage 1 Mind's Dilation 1 Possibility Storm 1 Thought Reflection Artifacts (15) 1 Chromatic Lantern 1 Coalition Relic 1 Commander's Sphere 1 Crawlspace 1 Darksteel Ingot 1 Dimir Signet 1 Expedition Map 1 Izzet Signet 1 Pyromancer's Goggles 1 Rakdos Signet 1 Sol Ring 1 Sphinx-Bone Wand 1 Thought Vessel 1 Venser's Journal 1 Wayfarer's Bauble Lands (38) 6 Island 6 Mountain 6 Swamp 1 Ash Barrens 1 Bloodstained Mire 1 Command Tower 1 Crumbling Necropolis 1 Desolate Lighthouse 1 Dimir Aqueduct 1 Evolving Wilds 1 Exotic Orchard 1 Grixis Panorama 1 Izzet Boilerworks 1 Polluted Delta 1 Rakdos Carnarium 1 Reliquary Tower 1 River of Tears 1 Scalding Tarn 1 Temple of Deceit 1 Temple of Epiphany 1 Temple of Malice 1 Temple of the False God 1 Terramorphic Expanse Rocky Tar Pit and noise like that
For those that do not know what a Monte-Carlo simulation is, you can read up on its use in Risk Analysis here
This guide examines the key differences between both versions, including print quality, rarity structure, pricing behaviour, and collecting value
He has worked on MTGJSON since 2016, and has led the design and development of versions 4 and 5
