Emry, Lurker of the Loch (SLC-2019) - Secret Lair 30th Anniversary Countdown Kit (Borderless)

Affinity for artifacts (This spell costs less to cast for each artifact you control.)
When Emry enters, mill four cards.
: Choose target artifact card in your graveyard. You may cast that card this turn. (You still pay its costs. Timing rules still apply.)