Emry, Lurker of the Loch (Retro Frame) (BRC 81) [The Brothers' War Commander]

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.)