Invade the City is a uncommon Sorcery card from The List (PLST), collector number WAR-201. Current market price: $1.74, TCGplayer market prices via Scryfall.
Amass Zombies X, where X is the number of instant and sorcery cards in your graveyard. (Put X +1/+1 counters on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)