Emry, Lurker of the Loch [Throne of Eldraine Prerelease Promos]

Set: Throne of Eldraine Prerelease Promos Type: Legendary Creature — Merfolk Wizard Rarity: Rare Cost: {2}{U} This spell costs {1} less to cast for each artifact you control.When Emry, Lurker of the Loch enters the battlefield, mill four cards.{T}: Choose target artifact card in your graveyard. You may cast that card this turn. (You still pay its costs. Timing rules still apply.)