Eternal Witness [Duel Decks: Izzet vs. Golgari] Construct cast it for its madness

cast it for its madness cost or put it into your graveyard

Set: Commander 2014 Type: Artifact Rarity: Rare Cost: {4} {1}

Set: Welcome Deck 2017 Type: Creature — Nightmare Horse Rarity: Rare Cost: {5}{B} Flying (This creature can't be blocked except by creatures with flying or reach

and then suddenly

Eternal Witness [Duel Decks: Izzet vs. Golgari] Construct cast it for its madnessSet: Duel Decks: Izzet vs. Golgari Type: Creature Human Shaman Rarity: Uncommon Cost: {1}{G}{G} When Eternal Witness enters the battlefield, you may return target card from your graveyard to your hand. She remembers every word spoken, from the hero's oath to the baby's cry.