A Journey in the Dark

If a creature card would be put in any graveryard, instead exiled it. You put a 3/3 green black Warg Wolf with Trample into the battlefield for each creature exiled this way
Suddenly Aragorn leapt to his feet. 'How the wind howls!' he cried. 'It is howling with wolf-voices. The Wargs have come west of the Mountains!'