Emry, Lurker of the Loch

Emry, Lurker of the Loch
{2}{U}

Legendary Creature - Merfolk Wizard | Power/Toughness: 1 / 2 (CMC 3)
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.)