March of the Machine Prerelease Promo Pack has variants:
Explore this pack in Sealed.

Sheets

Sheet promo_teamup

At rate 2/9 (22.22%)
Goro-Goro and Satoru
Katilda and Lier
Slimefoot and Squee
At rate 1/9 (11.11%)
Goro-Goro and Satoru
Katilda and Lier
Slimefoot and Squee

Sheet prerelease_promo

At rate 1/70 (1.43%)
Ancient Imperiosaur
Archpriest of Shadows
Ayara, Widow of the Realm
Ayara, Furnace Queen
Baral and Kari Zev
Bloated Processor
Bloodfeather Phoenix
Boon-Bringer Valkyrie
Breach the Multiverse
Chrome Host Seedshark
City on Fire
Complete the Circuit
Deeproot Wayfinder
Djeru and Hazoret
Doomskar Warrior
Drana and Linvala
Dusk Legion Duelist
Errant and Giada
Etali, Primal Conqueror
Etali, Primal Sickness
Faerie Mastermind
Ghalta and Mavren
Glissa, Herald of Predation
Glistening Dawn
Grafted Butcher
Guardian of Ghirapur
Heliod, the Radiant Dawn
Heliod, the Warped Eclipse
Hidetsugu and Kairi
Hoarding Broodlord
Inga and Esika
Into the Fire
Invasion of Alara
Awaken the Maelstrom
Invasion of Arcavios
Invocation of the Founders
Invasion of Fiora
Marchesa, Resolute Monarch
Invasion of Gobakhan
Lightshield Array
Invasion of Ikoria
Zilortha, Apex of Ikoria
Invasion of Ixalan
Belligerent Regisaur
Invasion of Kaldheim
Pyre of the World Tree
Invasion of Karsus
Refraction Elemental
Invasion of Segovia
Caetus, Sea Tyrant of Segovia
Invasion of Theros
Ephara, Ever-Sheltering
Invasion of Tolvada
The Broken Sky
Knight-Errant of Eos
Kogla and Yidaro
Nahiri's Warcrafting
Omnath, Locus of All
Ozolith, the Shattered Spire
Pile On
Polukranos Reborn
Polukranos, Engine of Ruin
Progenitor Exarch
Quintorius, Loremaster
Rampaging Raptor
Rankle and Torbran
Realmbreaker, the Invasion Tree
Rona, Herald of Invasion
Rona, Tolarian Obliterator
See Double
Sunfall
Transcendent Message
Tribute to the World Tree
Voldaren Thrillseeker
Yargle and Multani
Zephyr Singer
At rate 1/140 (0.71%)
Archangel Elspeth
Borborygmos and Fblthp
Chandra, Hope's Beacon
Elesh Norn
The Argent Etchings
Invasion of Innistrad
Deluge of the Dead
Invasion of New Phyrexia
Teferi Akosa of Zhalfir
Invasion of Ravnica
Guildpact Paragon
Invasion of Shandalar
Leyline Surge
Invasion of Tarkir
Defiant Thundermaw
Jin-Gitaxias
The Great Synthesis
Kroxa and Kunoros
Monastery Mentor
Sheoldred
The True Scriptures
Sword of Once and Future
Thalia and The Gitrog Monster
Urabrask
The Great Work
Vorinclex
The Grand Evolution
Wrenn and Realmbreaker
Zimone and Dina
Zurgo and Ojutai

Sheet promo_teamup_foil

At rate 2/9 (22.22%)
Goro-Goro and Satoru
Katilda and Lier
Slimefoot and Squee
At rate 1/9 (11.11%)
Goro-Goro and Satoru
Katilda and Lier
Slimefoot and Squee