Dauthi Hound

Shadow (This creature can block or be blocked by
only creatures with shadow.)
At the beginning of your upkeep, if there are
three or more cards named Dauthi Hound in
your graveyard, you may pay {b}{b}. If you do,
return all of them from your graveyard to the
battlefield.
"They appeared from the walls and chased us down!
Whole packs at a time!"