Death Beckoner

Affinity for Graveyards (This spell cost {1} less to
cast for each card in your graveyard.)
At the beginning of each combat step, you may
pay {b}. If you do, return a creature card from
target graveyard to your hand.
Cards from graveyards in your hand cost only {6}{b}{b} to cast. They have Affinity for Graveyards
as long as they are in your hand.