Dreadhorde Arcanist [War of the Spark Prerelease Promos] Tiefling Bard or they shuffle another creature

or they shuffle another creature they own into their library

Set: Ravnica: Clue Edition Type: Creature — Human Wizard Rarity: Uncommon Cost: {2}{W}{W} When Azorius Justiciar enters the battlefield

They are dead

Set: Commander Masters Type: Legendary Creature — Spirit Rarity: Uncommon Cost: {4}{B} Whenever a creature with power 1 or less is put into your graveyard from the battlefield

Dreadhorde Arcanist [War of the Spark Prerelease Promos] Tiefling Bard or they shuffle another creatureSet: War of the Spark Prerelease Promos Type: Creature Zombie Wizard Rarity: Rare Cost: {1}{R} Trample Whenever Dreadhorde Arcanist attacks, you may cast target instant or sorcery card with mana value less than or equal to Dreadhorde Arcanist's power from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.