C Common Majestic Mirage X TRAP Continuous If a face-up card you control leaves the field by your card effect, or to activate the effect of your card, and the card that left the field was "Stardust Dragon" or a Synchro Monster that mentioned it: You can apply 1 of the following effects, but you cannot apply that same effect of "Majestic Mirage" again this turn

1 Chaos Warp 1 Reverberate 1 Bile Blight 1 Bituminous Blast 1 Brainstorm 1 Dark Ritual Artifact (10) 1 Drach'Nyen 1 Chromatic Lantern 1 Assault Suit 1 Sol Ring 1 Talisman of Creativity 1 Talisman of Dominance 1 Talisman of Indulgence 1 Worn Powerstone 1 Commander's Sphere 1 Wayfarer's Bauble Enchantment (5) 1 The Horus Heresy 1 The Ruinous Powers 1 Nurgle's Rot 1 The Lost and the Damned 1 Warstorm Surge Land (38) 1 Exotic Orchard 1 Foreboding Ruins 1 Sunken Hollow 1 Barren Moor 1 Crumbling Necropolis 1 Molten Slagheap 1 Temple of the False God 1 Command Tower 1 Dismal Backwater 1 Evolving Wilds 1 Forgotten Cave 1 Path of Ancestry 1 Swiftwater Cliffs 1 Terramorphic Expanse 8 Mountain 8 Swamp 8 Island Blue (3) 1 Lord of Change 1 Heralds of Tzeentch 1 Brainstorm Black (14) 1 Blight Grenade 1 Great Unclean One 1 Mandate of Abaddon 1 Mortarion, Daemon Primarch 1 Nurgle's Conscription 1 Plague Drone 1 Poxwalkers 1 Sloppity Bilepiper 1 Tallyman of Nurgle 1 Venomcrawler 1 Nurgle's Rot 1 Decree of Pain 1 Bile Blight 1 Dark Ritual Red (17) 1 Aspiring Champion 1 Bloodthirster 1 Dark Apostle 1 Keeper of Secrets 1 Khrn the Betrayer 1 Knight Rampager 1 Let the Galaxy Burn 1 Bloodcrusher of Khorne 1 Chaos Terminator Lord 1 Herald of Slaanesh 1 Noise Marine 1 Seeker of Slaanesh 1 Past in Flames 1 Blasphemous Act 1 Chaos Warp 1 Reverberate 1 Warstorm Surge Multi colored (18) 1 Be'lakor, the Dark Master 1 Blood for the Blood God

Future events are sure to follow this, where promo cards will stay exclusive to those who participate
In addition to increasing your access to Sacred Beasts and your ability to Summon them, Yu-Gi-Oh
Not only does it do the Simic thing of throwing lands onto the battlefield and drawing you cards, it also buffs up your entire board