Ancient Dwarven Forge

Imprint - Whenever another nontoken artifact is
sent to the graveyard from the battlefield, you
may exile that card. If you do, return each other
card exiled with Ancient Dwarven Forge to its
owner's graveyard.
{3}, {t}: Create a token that's a copy of a card
exiled with Ancient Dwarven Forge. If it is a copy
of a card you do not own, sacrifice it at the next endstep.