Armies of Oblivion

When this card is played from your Hand,
Summon all copies of this card from your
Deck to the Battlefield.
When all copies of this card are removed from
Play, return all copies of this card to the Deck.
"The Armies of Oblivion are Endless. A Writhing
mass of Flesh and Steel. When you hear their march,
all you can do is pray your death is swift."