Throne of the Grim Captain // The Grim Captain (The Lost Caverns of Ixalan)

Legendary Artifact // Legendary Creature Ñ Skeleton Spirit Pirate - Throne of the Grim Captain: {T}: Mill two cards.
Craft with a Dinosaur, a Merfolk, a Pirate, and a Vampire {4} ({4}, Exile this artifact, Exile the four from among permanents you control and/or cards in your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) // The Grim Captain: Menace, trample, lifelink, hexproof
Whenever The Grim Captain attacks, each opponent sacrifices a nonland permanent of their choice. Then you may put an exiled creature card used to craft The Grim Captain onto the battlefield under your control tapped and attacking.