The Crucible is the Core Set 2019 Prerelease

M20

Angelic Gift (F)
Atemsis, All-Seeing
Bloodfell Caves (F)
Chandra, Acolyte of Flame
Cryptic Caves (F)
Dungeon Geists
Forest (F)
Hanged Executioner
Knight of the Ebon Legion
Mammoth Spider (F)
Masterful Replication
Mountain (F)
Nightpack Ambusher
Octoprophet (F)
Rapacious Dragon (F)
Soul Salvage (F)
Temple of Malady (F)
Temple of Mystery
Temple of Mystery (F)
Vilis, Broker of Blood
Wakeroot Elemental
Yarok's Fenlurker (F)

Thanks for looking