Emry, Lurker of the Loch is a rare Legendary Creature — Merfolk Wizard card from Throne of Eldraine Promos (PELD), collector number 43p. Current market price: $2.64 (foil $3.11), TCGplayer market prices via Scryfall.
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) When Emry enters, 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.)