Timmerian Fiends

Remove this card from your deck before playing if you're not playing for ante.
{B}{B}{B}, Sacrifice this creature: The owner of target artifact may ante the top card of their library. If that player doesn't, exchange ownership of that artifact and Timmerian Fiends. Put the artifact card into your graveyard and Timmerian Fiends from anywhere into that player's graveyard. This change in ownership is permanent.