Game description from the publisher:
No one is safe from the schemes the Dark Elves hatch in their City of Winter. With three copies each of 20 unique cards, half of which support the Dark Elves and their evil schemes, City of Winter is an invaluable Battle Pack for players looking to harness the Dark Elves and their fury.
Additionally, all the factions gain exciting new tactics cards that can return to the deck after they are played. The fifth Battle Pack in "The Capital Cycle" for Warhammer: Invasion The Card Game, City of Winter presents dramatic new deck-building options for the Dark Elves and other factions with 60 new cards (three copies each of 20 different cards).