Klezca-Nok, Onakke Mausoleum

Klezca-Nok, Onakke Mausoleum enters the battlefield tapped.
{t}: Add {r}.
{x}, {t}, Sacrifice an artifact, Sacrifice Klezca-Nok: Return target artifact card with converted mana cost X from your graveyard to the battlefield.
Seekers of the Onakke who do not truly understand sacrifice learn it well in Klezca-Nok.