Mutant Menace decks are full of the various mutated creatures and cryptids that have shown up throughout the franchise and its various iterations across America
Naturally, that exclusivity only upped the value of the cards

Prosper's Piling Treasure Prosper, Tome-Bound | Illustration by Yongjae Choi Commander (1) Planeswalkers (2) Chandra, Fire Artisan Chandra, Torch of Defiance Creatures (25) Academy Manufactor Arvinox, the Mind Flail Birgi, God of Storytelling Dauthi Voidwalker Dire Fleet Daredevil Dockside Extortionist Dream Devourer Etali, Primal Storm Goldspan Dragon Gonti, Lord of Luxury Grim Hireling Laelia, the Blade Reforged Magda, Brazen Outlaw Magmatic Channeler Marionette Master Mayhem Devil Mindleecher Murderous Rider Nadier's Nightblade Opposition Agent Ragavan, Nimble Pilferer Reckless Fireweaver Valki, God of Lies Wild-Magic Sorcerer Xorn Instants (6) Chaos Warp Commune with Lava Deflecting Swat Hurl Through Hell Terminate You Find Some Prisoners Sorceries (13) Blasphemous Act Demonic Tutor Feed the Swarm Ignite the Future Jeska's Will Light Up the Stage Praetor's Grasp Profane Tutor Shatterskull Smashing Throes of Chaos Toxic Deluge Vandalblast Bituminous Blast Enchantments (7) Outpost Siege Revel in Riches Share the Spoils Stolen Strategy Theater of Horrors Valakut Exploration Vance's Blasting Cannons Artifacts (12) Arcane Signet Altar of the Brood Cursed Mirror Mana Crypt Mind Stone Rakdos Signet Ruby Medallion Sol Ring Talisman of Indulgence Treasure Map Treasure Vault Uba Mask Lands (34) Blightstep Pathway Bojuka Bog Command Beacon Command Tower Dragonskull Summit Exotic Orchard Graven Cairns Haunted Ridge Smoldering Marsh Snow-Covered Mountain x11 Snow-Covered Swamp x11 Spinerock Knoll Sulfurous Springs Tainted Peak I've been enjoying my Prosper, Tome-Bound deck since Forgotten Realms was released, and boy is it fun

Throughout Magic's history, over eleven thousand unique creature cards have seen print, and it is often difficult to gauge just how powerful a given card may be
[c] Path to Exile[/c] (x2): This is probably my least favorite card in the sideboard, which is why there are only two of them
Hope of Ghirapur If The Prismatic Piper was jank, Hope of Ghirapur is slightly better jank