March of the Machine Arena Booster has variants:
Explore this pack in Sealed.

Sheets

Sheet basic_or_gainland

At rate 1/20 (5.0%)
Bloodfell Caves
Blossoming Sands
Dismal Backwater
Jungle Hollow
Rugged Highlands
Scoured Barrens
Swiftwater Cliffs
Thornwood Falls
Tranquil Cove
Wind-Scarred Crag
At rate 1/30 (3.33%)
Forest
Forest
Forest
Island
Island
Island
Mountain
Mountain
Mountain
Plains
Plains
Plains
Swamp
Swamp
Swamp

Sheet sfc_common (color balanced)

At rate 1/101 (0.99%)
Aerial Boost
Akki Scrapchomper
Alabaster Host Intercessor
Alabaster Host Sanctifier
Angelic Intervention
Arachnoid Adaptation
Assimilate Essence
Atraxa's Fall
Attentive Skywarden
Beamtown Beatstick
Bladed Battle-Fan
Blighted Burgeoning
Bola Slinger
Burning Sun's Fury
Chomping Kavu
Coming In Hot
Consuming Aetherborn
Converter Beast
Corrupted Conviction
Cosmic Hunger
Crystal Carapace
Cut Short
Deadly Derision
Disturbing Conversion
Dreg Recycler
Enduring Bondwarden
Ephara's Dispersal
Etched Familiar
Etched Host Doombringer
Expedition Lookout
Eyes of Gitaxias
Failed Conversion
Fertilid's Favor
Final Flourish
Flitting Guerrilla
Flywheel Racer
Furnace Host Charger
Furtive Analyst
Gloomfang Mauler
Golden-Scale Aeronaut
Halo Hopper
Halo-Charged Skaab
Hangar Scrounger
Ichor Drinker
Ichor Shade
Infected Defector
Inspired Charge
Iridescent Blademaster
Karsus Depthguard
Kitesail
Kithkin Billyrider
Knight of the New Coalition
Kor Halberd
Marauding Dreadship
Meeting of Minds
Mirran Banesplitter
Mirrodin Avenged
Moment of Truth
Negate
Nezumi Informant
Oculus Whelp
Onakke Javelineer
Overgrown Pest
Phyrexian Archivist
Placid Rottentail
Portent Tracker
Preening Champion
Protocol Knight
Ral's Reinforcements
Realmbreaker's Grasp
Redcap Heelslasher
Saiba Cryptomancer
Scrollshift
Searing Barb
Seed of Hope
Serpent-Blade Assailant
Shatter the Source
Sigiled Sentinel
Skittering Surveyor
Stasis Field
Sunder the Gateway
Swordsworn Cavalier
Temporal Cleansing
Tenured Oilcaster
Thrashing Frontliner
Thunderhead Squadron
Tidal Terror
Timberland Ancient
Trailblazing Historian
Traumatic Revelation
Unseal the Necropolis
Urn of Godfire
Vanquish the Weak
Vengeant Earth
Volcanic Spite
War Historian
War-Trained Slasher
Wary Thespian
Wildwood Escort
Wrenn's Resolve
Zhalfirin Shapecraft

Sheet sfc_uncommon

At rate 1/50 (2.0%)
Artistic Refusal
Astral Wingspan
Botanical Brawler
Change the Equation
Collective Nightmare
Compleated Huntmaster
Copper Host Crusher
Corruption of Towashi
Elspeth's Smite
Elvish Vatkeeper
Fearless Skald
Furnace Gremlin
Furnace Reins
Gift of Compleation
Glistening Deluge
Halo Forager
Joyful Stormsculptor
Kami of Whispered Hopes
Lithomantic Barrage
Marshal of Zhalfir
Merciless Repurposing
Mirror-Shield Hoplite
Mutagen Connoisseur
Norn's Inquisitor
Omen Hawker
Oracle of Tragedy
Phyrexian Awakening
Phyrexian Censor
Phyrexian Gargantua
Ramosian Greatsword
Rampaging Geoderm
Ravenous Sailback
Render Inert
Sandstalker Moloch
Scorn-Blade Berserker
Scrappy Bruiser
Sculpted Perfection
Seal from Existence
Shivan Branch-Burner
Stoke the Flames
Storm the Seedcore
Stormclaw Rager
Streetwise Negotiator
Surge of Salvation
Tandem Takedown
Tangled Skyline
Tiller of Flesh
Wicked Slumber
Xerex Strobe-Knight
Zhalfirin Lancer

Sheet dfc_common_uncommon

At rate 1/10 (10.0%)
Aetherblade Agent
Gitaxian Mindstinger
Bonded Herdbeast
Plated Kilnbeast
Order of the Mirror
Order of the Alabaster Host
Pyretic Prankster
Glistening Goremonger
Tarkir Duneshaper
Burnished Dunestomper
At rate 1/20 (5.0%)
Blightreaper Thallid
Blightsower Thallid
Captive Weird
Compleated Conjurer
Gnottvold Hermit
Chrome Host Hulk
Harried Artisan
Phyrexian Skyflayer
Herbology Instructor
Malady Invoker
Khenra Spellspear
Gitaxian Spellstalker
Nezumi Freewheeler
Hideous Fleshwheeler
Seraph of New Capenna
Seraph of New Phyrexia
Skyclave Aerialist
Skyclave Invader
Sun-Blessed Guardian
Furnace-Blessed Conqueror

Sheet uncommon_battle

At rate 1/20 (5.0%)
Invasion of Amonkhet
Lazotep Convert
Invasion of Azgol
Ashen Reaper
Invasion of Belenon
Belenon War Anthem
Invasion of Dominaria
Serra Faithkeeper
Invasion of Eldraine
Prickle Faeries
Invasion of Ergamon
Truga Cliffcharger
Invasion of Kaladesh
Aetherwing, Golden-Scale Flagship
Invasion of Kamigawa
Rooftop Saboteurs
Invasion of Kylem
Valor's Reach Tag Team
Invasion of Lorwyn
Winnowing Forces
Invasion of Mercadia
Kyren Flamewright
Invasion of Moag
Bloomwielder Dryads
Invasion of Muraganda
Primordial Plasm
Invasion of New Capenna
Holy Frazzle-Cannon
Invasion of Pyrulea
Gargantuan Slabhorn
Invasion of Regatha
Disciples of the Inferno
Invasion of Ulgrotha
Grandmother Ravi Sengir
Invasion of Vryn
Overloaded Mage-Ring
Invasion of Xerex
Vertex Paladin
Invasion of Zendikar
Awakened Skyclave

Sheet sfc_rare_mythic

At rate 1/49 (2.04%)
Ancient Imperiosaur
Archpriest of Shadows
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
Faerie Mastermind
Ghalta and Mavren
Glissa, Herald of Predation
Glistening Dawn
Grafted Butcher
Guardian of Ghirapur
Hidetsugu and Kairi
Hoarding Broodlord
Inga and Esika
Into the Fire
Knight-Errant of Eos
Kogla and Yidaro
Nahiri's Warcrafting
Omnath, Locus of All
Ozolith, the Shattered Spire
Pile On
Progenitor Exarch
Quintorius, Loremaster
Rampaging Raptor
Rankle and Torbran
Realmbreaker, the Invasion Tree
See Double
Sunfall
Transcendent Message
Tribute to the World Tree
Voldaren Thrillseeker
Yargle and Multani
Zephyr Singer
At rate 1/98 (1.02%)
Archangel Elspeth
Borborygmos and Fblthp
Chandra, Hope's Beacon
Kroxa and Kunoros
Monastery Mentor
Sword of Once and Future
Thalia and The Gitrog Monster
Wrenn and Realmbreaker
Zimone and Dina
Zurgo and Ojutai

Sheet multiverse_legend

At rate 4/155 (2.58%)
Aegar, the Freezing Flame
Daxos, Blessed by the Sun
Dina, Soul Steeper
Firja, Judge of Valor
Fynn, the Fangbearer
Imoti, Celebrant of Bounty
Inga Rune-Eyes
Juri, Master of the Revue
Kwende, Pride of Femeref
Radha, Coalition Warlord
Raff, Weatherlight Stalwart
Renata, Called to the Hunt
Reyav, Master Smith
Rona, Sheoldred's Faithful
Shanna, Sisay's Legacy
Tetsuko Umezawa, Fugitive
Tymaret, Chosen from Death
Valduk, Keeper of the Flame
Yargle, Glutton of Urborg
Zada, Hedron Grinder
At rate 2/155 (1.29%)
Anafenza, Kin-Tree Spirit
Arixmethes, Slumbering Isle
Atris, Oracle of Half-Truths
Ayara, First of Locthwain
Baral, Chief of Compliance
Brudiclad, Telchor Engineer
Captain Lannery Storm
Emry, Lurker of the Loch
Firesong and Sunspeaker
Goreclaw, Terror of Qal Sisma
Gyruda, Doom of Depths
Horobi, Death's Wail
Jegantha, the Wellspring
Judith, the Scourge Diva
Kaheera, the Orphanguard
Keruga, the Macrosage
Lathiel, the Bounteous Dawn
Lurrus of the Dream-Den
Lutri, the Spellchaser
Obosh, the Preypiercer
Seizan, Perverter of Truth
Squee, the Immortal
Sram, Senior Edificer
Taigam, Ojutai Master
Teysa Karlov
Thalia, Guardian of Thraben
Umori, the Collector
Yedora, Grave Gardener
Yorion, Sky Nomad
Zirda, the Dawnwaker
At rate 1/155 (0.65%)
Atraxa, Praetors' Voice
Aurelia, the Warleader
Elesh Norn, Grand Cenobite
Ezuri, Claw of Progress
Grimgrin, Corpse-Born
Jin-Gitaxias, Core Augur
Kenrith, the Returned King
Kroxa, Titan of Death's Hunger
Niv-Mizzet Reborn
Ragavan, Nimble Pilferer
Sheoldred, Whispering One
Skithiryx, the Blight Dragon
Urabrask the Hidden
Vorinclex, Voice of Hunger
Yarok, the Desecrated

Sheet rare_mythic_battle

At rate 2/27 (7.41%)
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
At rate 1/27 (3.7%)
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

Sheet dfc_rare_mythic

At rate 2/15 (13.33%)
Ayara, Widow of the Realm
Ayara, Furnace Queen
Etali, Primal Conqueror
Etali, Primal Sickness
Heliod, the Radiant Dawn
Heliod, the Warped Eclipse
Polukranos Reborn
Polukranos, Engine of Ruin
Rona, Herald of Invasion
Rona, Tolarian Obliterator
At rate 1/15 (6.67%)
Elesh Norn
The Argent Etchings
Jin-Gitaxias
The Great Synthesis
Sheoldred
The True Scriptures
Urabrask
The Great Work
Vorinclex
The Grand Evolution