41 cards where the set is “m20” and the cards are exclusive to a Starter deck

Angelic Guardian (Core Set 2020 #302)
Bastion Enforcer (Core Set 2020 #303)
Concordia Pegasus (Core Set 2020 #304)
Haazda Officer (Core Set 2020 #305)
Imperial Outrider (Core Set 2020 #307)
Ironclad Krovod (Core Set 2020 #308)
Prowling Caracal (Core Set 2020 #309)
Serra's Guardian (Core Set 2020 #310)
Show of Valor (Core Set 2020 #311)
Siege Mastodon (Core Set 2020 #312)
Take Vengeance (Core Set 2020 #313)
Trusted Pegasus (Core Set 2020 #314)
Coral Merfolk (Core Set 2020 #315)
Phantom Warrior (Core Set 2020 #316)
Riddlemaster Sphinx (Core Set 2020 #317)
Snapping Drake (Core Set 2020 #318)
Bartizan Bats (Core Set 2020 #319)
Bogstomper (Core Set 2020 #320)
Dark Remedy (Core Set 2020 #321)
Disentomb (Core Set 2020 #322)
Gravewaker (Core Set 2020 #323)
Skeleton Archer (Core Set 2020 #324)
Sorin's Thirst (Core Set 2020 #325)
Vampire Opportunist (Core Set 2020 #326)
Walking Corpse (Core Set 2020 #327)
Engulfing Eruption (Core Set 2020 #328)
Fearless Halberdier (Core Set 2020 #329)
Goblin Assailant (Core Set 2020 #330)
Hostile Minotaur (Core Set 2020 #331)
Immortal Phoenix (Core Set 2020 #332)
Nimble Birdsticker (Core Set 2020 #333)
Rubblebelt Recluse (Core Set 2020 #334)
Shivan Dragon (Core Set 2020 #335)
Volcanic Dragon (Core Set 2020 #336)
Bristling Boar (Core Set 2020 #338)
Canopy Spider (Core Set 2020 #339)
Frilled Sandwalla (Core Set 2020 #340)
Oakenform (Core Set 2020 #341)
Prized Unicorn (Core Set 2020 #342)
Titanic Growth (Core Set 2020 #343)
Woodland Mystic (Core Set 2020 #344)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.