Engineer of the Dark Future

When Engineer of the Dark Future enters the battlefield, you may search your library for an artifact card and exile it. If you do, shuffle your library.
You may cast cards exiled with Engineer of the
Dark Future.
{x}{b}{b}: Exile target nonland permanent with converted mana cost X.
{x}, {t}, pay X life: Exile X target permanents. X
must be 8 or greater.