Pillar of Origins [Ixalan] Dauthi Minion Set: Urza's Saga Type: Sorcery

Set: Urza's Saga Type: Sorcery Rarity: Uncommon Cost: {X}{R} Destroy each artifact with mana value X or less

Set: Magic 2010 Type: Creature — Human Assassin Rarity: Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature

and you may cast the copy without paying its mana cost

Set: Innistrad Type: Creature — Avatar Rarity: Mythic Cost: {3}{G}{G}{G} Creatures you control enter the battlefield as a copy of Essence of the Wild

Pillar of Origins [Ixalan] Dauthi Minion Set: Urza's Saga Type: SorcerySet: Ixalan Type: Artifact Rarity: Uncommon Cost: {2} As Pillar of Origins enters the battlefield, choose a creature type. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.