Army of the Dead

Whenever Army of the Dead attacks, Surveil 1.

Theshold—You may cast Army of the Dead from your graveyard as long as there are seven or more cards in your graveyard.

"Winter is coming, we know what's coming with it.
We can learn to live with the Wildlings, or we can
add them to the army of the dead."—Jon Snow, Commander of the Nights' Watch