Black Market Connections (Foil Etched) [Assassin's Creed] The Lost Caverns of Ixalan Promos attach it to target legendary

attach it to target legendary creature you control

Splice onto Arcane {2}{B} (As you cast an Arcane spell

Set: Outlaws of Thunder Junction Prerelease Promos Type: Creature — Hydra Rarity: Mythic Cost: {X}{G} Vigilance

(Leads to: Mad Wizard's Lair)

It is found here

Black Market Connections (Foil Etched) [Assassin's Creed] The Lost Caverns of Ixalan Promos attach it to target legendarySet: Assassin's Creed Type: Enchantment Rarity: Rare Cost: {2}{B} At the beginning of your precombat main phase, choose one or more Sell Contraband Create a Treasure token. You lose 1 life. Buy Information Draw a card. You lose 2 life. Hire a Mercenary Create a 3 2 colorless Shapeshifter creature token with changeling. You lose 3 life. (It has every creature type.)